by | Sep 27, 2025
PRO-SET HTP-287 Hardener
Safety Data Sheet
According to the Hazard Communication Standard (CFR29 1910.1200) HazCom 2012 and the Hazardous Products
Regulations (HPR) WHMIS 2015
Date of issue: 03/23/2018 Revision date: 05/15/2018 Version: HTP-287-2018b
05/15/2018 EN (English) Page 1
SECTION 1: Identification
Identification
Product form : Mixture
Product name : PRO-SET HTP-287 Hardener
Product code : HTP-28, HTP-287-1, HTP-287-2, HTP-287-3, HTP-287-4, HTP-287-5
Relevant identified uses of the substance or mixture and uses advised against
Recommended use : Curing agent for epoxy resins
Details of the supplier of the safety data sheet
Supplier
Gougeon Brothers, Inc
100 Patterson Ave.
Bay City, MI 48706 – U.S.A.
T 888-377-6738 or 989-684-7286
www.prosetepoxy.com
Emergency telephone number
Emergency number : CHEMTREC 1 (800) 424-9300
CHEMTREC International +1 (703) 527-3887 24 hr
SECTION 2: Hazard(s) identification
Classification of the substance or mixture
Acute Tox. 4 (Oral)
Skin Corr. 1C
Eye Dam. 1
Skin Sens. 1
Carc. 2
STOT RE 2
Aquatic Acute 2
Aquatic Chronic 2
Label elements
Hazard pictograms (GHS) :
GHS05
GHS07
GHS08
GHS09
Signal word (GHS)
:
Danger
Hazard statements (GHS)
:
Harmful if swallowed. Causes severe skin burns and eye damage. May cause an allergic skin reaction. Suspected of causing cancer. May cause
damage to organs through prolonged or repeated exposure (oral). Toxic to aquatic life with long lasting effects.
Precautionary statements (GHS)
:
Obtain special instructions before use. Do not handle until all safety precautions have been read and understood. Do not breathe
dust/fume/gas/mist/vapours/spray. Wash hands, forearms and face thoroughly after handling. Do not eat, drink or smoke when using this product.
Contaminated work clothing must not be allowed out of the workplace. Avoid release to the environment. Wear protective gloves/protective
clothing/eye protection/face protection. If exposed or concerned: Get medical advice/attention. If swallowed: rinse mouth. Do NOT induce vomiting.
If on skin (or hair): Take off immediately all contaminated clothing. Rinse skin with water/shower. Wash contaminated clothing before reuse. If skin
irritation or rash occurs: Get medical advice/attention. If inhaled: Remove person to fresh air and keep comfortable for breathing. IF IN EYES: Rinse
cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. Immediately call a poison
center/doctor. Collect spillage. Store locked up. Dispose of contents/container to hazardous or special waste collection point, in accordance with
local, regional, national and/or international regulation
Other hazards
No additional information available
PRO-SET HTP-287 Hardener
Safety Data Sheet
According to the Hazard Communication Standard (CFR29 1910.1200) HazCom 2012 and the Hazardous Products Regulations (HPR) WHMIS 2015
05/15/2018 EN (English) 2/8
Unknown acute toxicity
Not applicable
SECTION 3: Composition/information on ingredients
Substances
Not applicable
Mixtures
Name Product identifier %
Isophoronediamine
(CAS-No.) 2855-13-2 45 – 70
Cyclohexanamine, 4,4′-methylenebis-
(CAS-No.) 1761-71-3 30 – 60
Diethylenetriamine-bisphenol A-epichlorohydrin polymer
(CAS-No.) 31326-29-1 5 – 10
Diethylenetriamine
(CAS-No.) 111-40-0 1 – 5
1H-Imidazole, 2-ethyl-4-methyl-
(CAS-No.) 931-36-2 1 – 5
4-Methylimidazole
(CAS-No.) 822-36-6 0.1 – 1.0
The exact chemical identity and/or exact percentage (concentration) of each ingredient may be held as confidential business information (CBI). Any
ingredient not disclosed in this section may have been determined not to be hazardous to health or the environment, or it may be present at a level
below its disclosure threshold. Refer to Section 15 for additional information regarding this CBI claim.
SECTION 4: First aid measures
Description of first aid measures
First-aid measures after inhalation : If inhaled: Remove person to fresh air and keep comfortable for breathing. Immediately call a
POISON CENTER/doctor.
First-aid measures after skin contact : If on skin (or hair): Take off immediately all contaminated clothing. Rinse skin with
water/shower. Wash contaminated clothing before reuse. Immediately call a POISON
CENTER/doctor.
First-aid measures after eye contact : IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present
and easy to do. Continue rinsing. Immediately call a POISON CENTER/doctor.
First-aid measures after ingestion : IF SWALLOWED: rinse mouth. Do NOT induce vomiting. Never give anything by mouth to an
unconscious person. Immediately call a POISON CENTER/doctor.
Most important symptoms and effects, both acute and delayed
Symptoms/effects after inhalation : Causes burns to the respiratory system.
Symptoms/effects after skin contact : Causes severe skin burns. Symptoms may include redness, pain, blisters. May cause an
allergic skin reaction.
Symptoms/effects after eye contact : Causes serious eye damage. Symptoms may include discomfort or pain, excess blinking and
tear production, with marked redness and swelling of the conjunctiva. May cause burns.
Symptoms/effects after ingestion : Harmful if swallowed. May cause gastrointestinal irritation, nausea, vomiting and diarrhea. May
cause burns or irritation of the linings of the mouth, throat, and gastrointestinal tract.
Indication of any immediate medical attention and special treatment needed
Symptoms may be delayed. In case of accident or if you feel unwell, seek medical advice immediately (show the label where possible).
SECTION 5: Firefighting measures
Extinguishing media
Suitable extinguishing media : Foam. Carbon dioxide. Dry chemical.
Unsuitable extinguishing media : Do not use a heavy water stream.
Special hazards arising from the substance or mixture
Fire hazard : Products of combustion may include, and are not limited to: oxides of carbon. Oxides of
nitrogen. Amines. Ammonia. Nitric acid. Irritating fumes. When mixed with sawdust, wood
chips, or other cellulosic material, spontaneous combustion can occur under certain conditions.
Heat is generated as the air oxidizes the amine. If the heat is not dissipated quickly enough, it
can ignite the sawdust.
Reactivity : No dangerous reactions known under normal conditions of use.
Advice for firefighters
Protection during firefighting : Keep upwind of fire. Wear full fire fighting turn-out gear (full Bunker gear) and respiratory
protection (SCBA).
PRO-SET HTP-287 Hardener
Safety Data Sheet
According to the Hazard Communication Standard (CFR29 1910.1200) HazCom 2012 and the Hazardous Products Regulations (HPR) WHMIS 2015
05/15/2018 EN (English) 3/8
SECTION 6: Accidental release measures
Personal precautions, protective equipment and emergency procedures
General measures : Use personal protection recommended in Section 8. Isolate the hazard area and deny entry to
unnecessary and unprotected personnel.
For non-emergency personnel
No additional information available
For emergency responders
No additional information available
Environmental precautions
Prevent entry to sewers and public waters. Notify authorities if product enters sewers or public waters.
Methods and material for containment and cleaning up
For containment : Absorb and/or contain spill with inert material (sand, vermiculite or other appropriate material),
then place in suitable container. Do not flush into surface water or sewer system. Wear
recommended personal protective equipment. Do not use sawdust or other combustible
material to absorb spilled material.
Methods for cleaning up : Sweep or shovel spills into appropriate container for disposal. Provide ventilation.
Reference to other sections
For further information refer to section 8: “Exposure controls/personal protection”.
SECTION 7: Handling and storage
Precautions for safe handling
Precautions for safe handling : DO NOT spray apply or heat this product. Obtain special instructions before use. Do not handle
until all safety precautions have been read and understood. Do not get in eyes, on skin, or on
clothing. Do not breathe dust/fume/gas/mist/vapours/spray. Do not swallow. Handle and open
container with care. Do not eat, drink or smoke when using this product. Ensure adequate
ventilation. When mixed with epoxy resin this product causes an exothermic reaction, which in
large masses, can produce enough heat to damage or ignite surrounding materials and emit
fumes and vapors that vary widely in composition and toxicity.
Hygiene measures : Wash contaminated clothing before reuse. Always wash hands after handling the product.
Conditions for safe storage, including any incompatibilities
Storage conditions : Keep out of the reach of children. Keep container tightly closed. Store in dry, cool, well-
ventilated area. Store locked up.
Storage temperature : 40 – 90 F / 4 – 32 C
SECTION 8: Exposure controls/personal protection
Control parameters
Isophoronediamine (2855-13-2)
Not applicable
Cyclohexanamine, 4,4′-methylenebis- (1761-71-3)
Not applicable
Diethylenetriamine-bisphenol A-epichlorohydrin polymer (31326-29-1)
ACGIH ACGIH TWA (mg/m ) Refer to Diethylenetriamine
Diethylenetriamine (111-40-0)
ACGIH ACGIH TWA (ppm) 1 ppm (skin)
1H-Imidazole, 2-ethyl-4-methyl- (931-36-2)
Not applicable
4-Methylimidazole (822-36-6)
Not applicable
Exposure controls
Appropriate engineering controls : Ensure good ventilation of the work station.
Hand protection : Wear suitable gloves resistant to chemical penetration.
PRO-SET HTP-287 Hardener
Safety Data Sheet
According to the Hazard Communication Standard (CFR29 1910.1200) HazCom 2012 and the Hazardous Products Regulations (HPR) WHMIS 2015
05/15/2018 EN (English) 4/8
Eye protection : Wear eye/face protection.
Skin and body protection : Wear suitable protective clothing.
Respiratory protection : In case of insufficient ventilation, wear suitable respiratory equipment. Respirator selection
must be based on known or anticipated exposure levels, the hazards of the product and the
safe working limits of the selected respirator.
Environmental exposure controls : Avoid release to the environment.
Other information : Handle in accordance with good industrial hygiene and safety procedures. Do not eat, drink or
smoke when using this product.
SECTION 9: Physical and chemical properties
Information on basic physical and chemical properties
Physical state : Liquid
Appearance : No data available
Colour : Slight Amber
Odour : Ammonia
Odour threshold : No data available
pH : 12.46
Melting point : No data available
Freezing point : No data available
Boiling point : > 400 F / 204 C [Estimated based similar product]
Flash point : > 200 F / 93 C [Estimated based similar product]
Relative evaporation rate (butylacetate=1) : No data available
Flammability (solid, gas) : No data available
Vapour pressure : < 1 mm Hg @ 20 C [Estimated based on ingredient data]
Relative vapour density at 20 C : No data available
Relative density : 0.95
Solubility : No data available
Partition coefficient n-octanol/water : No data available
Auto-ignition temperature : No data available
Decomposition temperature : No data available
Viscosity, kinematic : 55 mm /s @ 22 C
Viscosity, dynamic : No data available
Explosive limits : No data available
Explosive properties : No data available
Oxidising properties : No data available
Other information
VOC content : 2.22 g/l [Mixed epoxy resin and hardener - HTP-187 / HTP-287 (ASTM 2369-07)]
Bulk density : 7.98 lb/gal / 0.95 kg/L
SECTION 10: Stability and reactivity
Reactivity : No dangerous reactions known under normal conditions of use.
Chemical stability : Stable under normal conditions.
Possibility of hazardous reactions : No dangerous reactions known under normal conditions of use. A mass of more than one
pound of product plus an epoxy resin will cause irreversible polymerization with significant heat
buildup and pressure.
Conditions to avoid : Heat. Incompatible materials.
Incompatible materials : Acids. Oxidizing materials. Halogenated compounds. Nitrosating agents. Sodium hypochlorite.
Hazardous decomposition products : May include, and are not limited to: oxides of carbon. Oxides of nitrogen. Amines. Ammonia.
Nitric acid.
SECTION 11: Toxicological information
Information on toxicological effects
Isophoronediamine (2855-13-2)
LD50 oral rat 1030 mg/kg
PRO-SET HTP-287 Hardener
Safety Data Sheet
According to the Hazard Communication Standard (CFR29 1910.1200) HazCom 2012 and the Hazardous Products Regulations (HPR) WHMIS 2015
05/15/2018 EN (English) 5/8
Isophoronediamine (2855-13-2)
LD50 dermal rabbit > 2000 mg/kg
LC50 inhalation rat > 5.01 mg/l/4h mist
Cyclohexanamine, 4,4′-methylenebis- (1761-71-3)
LD50 oral rat 380 mg/kg
LD50 dermal rabbit > 1000 mg/kg
Diethylenetriamine-bisphenol A-epichlorohydrin polymer (31326-29-1)
LD50 oral rat Refer to Diethylenetriamine data; ATPE (500 mg/kg)
LD50 dermal rabbit Refer to Diethylenetriamine data; ATPE (1100 mg/kg)
LC50 inhalation rat No data available. Refer to Diethylenetriamine data.
Diethylenetriamine (111-40-0)
LD50 oral rat 1620 mg/kg
LD50 dermal rabbit 1090 mg/kg
LC50 inhalation rat 0.07 – 0.3 mg/l/4h aerosol/mist
1H-Imidazole, 2-ethyl-4-methyl- (931-36-2)
LD50 oral rat 731 – 1000 mg/kg
LD50 dermal rabbit > 400 mg/kg
4-Methylimidazole (822-36-6)
LD50 oral rat 350 – 751 mg/kg
LD50 dermal rabbit 440 mg/kg
Acute toxicity (oral) : Harmful if swallowed.
Acute toxicity (dermal) : Not classified.
Acute toxicity (inhalation) : Not classified.
Skin corrosion/irritation : Causes severe skin burns.
pH: 12.46
Serious eye damage/irritation : Causes serious eye damage.
pH: 12.46
Respiratory or skin sensitization : May cause an allergic skin reaction.
Germ cell mutagenicity : Not classified.
Carcinogenicity : Suspected of causing cancer.
4-Methylimidazole (822-36-6)
IARC group 2B – Possibly carcinogenic to humans
In OSHA Hazard Communication Carcinogen list Yes
Reproductive toxicity : Not classified.
STOT-single exposure : Not classified.
STOT-repeated exposure : May cause damage to organs through prolonged or repeated exposure (oral).
Aspiration hazard : Not classified.
PRO-SET HTP-287 Hardener
Viscosity, kinematic (calculated value) 55 mm /s @ 22 C
Symptoms/effects after inhalation : Causes burns to the respiratory system.
Symptoms/effects after skin contact : Causes severe skin burns. Symptoms may include redness, pain, blisters. May cause an
allergic skin reaction.
Symptoms/effects after eye contact : Causes serious eye damage. Symptoms may include discomfort or pain, excess blinking and
tear production, with marked redness and swelling of the conjunctiva. May cause burns.
Symptoms/effects after ingestion : Harmful if swallowed. May cause gastrointestinal irritation, nausea, vomiting and diarrhea. May
cause burns or irritation of the linings of the mouth, throat, and gastrointestinal tract.
Other information : Likely routes of exposure: ingestion, inhalation, skin and eye.
PRO-SET HTP-287 Hardener
Safety Data Sheet
According to the Hazard Communication Standard (CFR29 1910.1200) HazCom 2012 and the Hazardous Products Regulations (HPR) WHMIS 2015
05/15/2018 EN (English) 6/8
SECTION 12: Ecological information
Toxicity
Ecology – general : Toxic to aquatic life with long lasting effects.
Isophoronediamine (2855-13-2)
EC50 Daphnia 1 14.6 – 21.5 mg/l (Exposure time: 48 h – Species: Daphnia magna [semi-static])
Diethylenetriamine (111-40-0)
LC50 fish 1 248 mg/l (Exposure time: 96 h – Species: Poecilia reticulata [static])
EC50 Daphnia 1 16 mg/l (Exposure time: 48 h – Species: Daphnia magna)
LC50 fish 2 1014 mg/l (Exposure time: 96 h – Species: Poecilia reticulata [semi-static])
4-Methylimidazole (822-36-6)
EC50 Daphnia 1 180 mg/l (Exposure time: 48 h – Species: Daphnia magna)
Ingredient CAS# Ecotoxicity Classification Information
Isophoronediamine
2855-13-2 Acute Aquatic Cat. 3; Chronic Aquatic Cat. 3
Cyclohexanamine, 4,4′-methylenebis-
1761-71-3 Acute Aquatic Cat. 2; Chronic Aquatic Cat. 2
Diethylenetriamine-bisphenol A-epichlorohydrin polymer
31326-29-1 Not classified
Diethylenetriamine
111-40-0 Not classified
1H-Imidazole, 2-ethyl-4-methyl-
931-36-2 Acute Aquatic Cat. 3; Chronic Aquatic Cat. 3
4-Methylimidazole
822-36-6 Not classified
Persistence and degradability
PRO-SET HTP-287 Hardener
Persistence and degradability Not established.
Bioaccumulative potential
PRO-SET HTP-287 Hardener
Bioaccumulative potential Not established.
Isophoronediamine (2855-13-2)
Partition coefficient n-octanol/water 0.79 (at 23 C)
Cyclohexanamine, 4,4′-methylenebis- (1761-71-3)
Partition coefficient n-octanol/water 2.03
Diethylenetriamine (111-40-0)
BCF fish 1 0.3 – 1.7
Partition coefficient n-octanol/water -1.3
4-Methylimidazole (822-36-6)
Partition coefficient n-octanol/water 0.35 (at 25 C)
Mobility in soil
PRO-SET HTP-287 Hardener
Ecology – soil No additional information available.
Other adverse effects
Other information : No other effects known.
SECTION 13: Disposal considerations
Waste treatment methods
Product/Packaging disposal
recommendations
: Dispose in a safe manner in accordance with local/national regulations.
PRO-SET HTP-287 Hardener
Safety Data Sheet
According to the Hazard Communication Standard (CFR29 1910.1200) HazCom 2012 and the Hazardous Products Regulations (HPR) WHMIS 2015
05/15/2018 EN (English) 7/8
SECTION 14: Transport information
Department of Transportation (DOT) and Transportation of Dangerous Goods (TDG)
In accordance with DOT/TDG
UN-No.(DOT/TDG) : UN2735
Proper Shipping Name (DOT/TDG) : Polyamines, liquid, corrosive, n.o.s.
Proper Shipping Name – Addition : Methylenebiscyclohexanamine, 4,4 –
Class (DOT/TDG) : 8 – Class 8 – Corrosive material 49 CFR 173.136
Packing group (DOT/TDG) : III
Transport by sea
In accordance with IMDG
UN-No. (IMDG) : 2735
Proper Shipping Name (IMDG) : POLYAMINES, LIQUID, CORROSIVE, N.O.S.
Proper Shipping Name – Addition : Methylenebiscyclohexanamine, 4,4 –
Class (IMDG) : 8 – Corrosive substances
Packing group (IMDG) : III
EmS-No. (1) : F-A, S-B
Marine pollutant : Yes
Transport by air
In accordance with IATA
UN-No. (IATA) : 2735
Proper Shipping Name (IATA) : Polyamines, liquid, corrosive, n.o.s.
Proper Shipping Name – Addition : Methylenebiscyclohexanamine, 4,4 –
Class (IATA) : 8 – Corrosives
Packing group (IATA) : III
Marine pollutant : Yes
SECTION 15: Regulatory information
Federal regulations
All components of this product are listed, or excluded from listing, on the United States Environmental Protection Agency Toxic Substances
Control Act (TSCA) inventory.
All components of this product are listed, or excluded from listing, on the Canadian DSL (Domestic Substances List) and NDSL (Non-Domestic
Substances List) inventories.
Diethylenetriamine-bisphenol A-epichlorohydrin polymer (31326-29-1)
EPA TSCA Regulatory Flag XU – XU – indicates a substance exempt from reporting under Chemical Data Reporting Rule
(formerly the Inventory Update Reporting Rule), i.e, Partial Updating of the TSCA Inventory
Data Base Production and Site Reports (40 CFR 711).
Canada WHMIS Confidential Business Information (CBI): No data available
International regulations
No additional information available
US State regulations
WARNING
This product can expose you to 4-Methylimidazole, which is known to the State of California to cause cancer. For more
information go to www.P65Warnings.ca.gov.
4-Methylimidazole (822-36-6)
U.S. – California –
Proposition 65 –
Carcinogens List
U.S. – California –
Proposition 65 –
Developmental Toxicity
U.S. – California –
Proposition 65 –
Reproductive Toxicity –
Female
U.S. – California –
Proposition 65 –
Reproductive Toxicity –
Male
No significant risk
level (NSRL)
Yes No No No 29 g/day
PRO-SET HTP-287 Hardener
Safety Data Sheet
According to the Hazard Communication Standard (CFR29 1910.1200) HazCom 2012 and the Hazardous Products Regulations (HPR) WHMIS 2015
05/15/2018 EN (English) 8/8
Isophoronediamine (2855-13-2)
U.S. – New Jersey – Right to Know Hazardous Substance List
Diethylenetriamine (111-40-0)
U.S. – New Jersey – Right to Know Hazardous Substance List
U.S. – Pennsylvania – RTK (Right to Know) List
SECTION 16: Other information
Date of issue : 03/23/2018
Revision date : 05/15/2018
Other information : None.
NFPA health hazard : 3
NFPA fire hazard : 1
NFPA reactivity : 0
Hazard Rating
Health : 3 Serious Hazard
Flammability : 1 Slight Hazard
Physical : 0 Minimal Hazard
Disclaimer: We believe the statements, technical information and recommendations contained herein are reliable, but they are given without warranty or guarantee of any kind. The information contained
in this document applies to this specific material as supplied. It may not be valid for this material if it is used in combination with any other materials. It is the user s responsibility to satisfy oneself as to the
suitability and completeness of this information for the user s own particular use.
by | Sep 27, 2025
SAFETY DATA SHEET
Last Revised: 01FEB24
1. CHEMICAL PRODUCT AND COMPANY IDENTIFICATION
PRODUCT NAME: ……………………………………… PRO-SET
HTP-286 Hardener
APPLICABLE PRODUCT CODES: ………………. HTP-286, HTP-286-1, HTP-286-QC-1, HTP-286-2, HTP-286-QC-2 HTP-286-3, HTP-286-QC-3,
HTP286-4, HTP-286-QC-4, HTP286-5
CHEMICAL FAMILY: ………………………………….. Polyamine-imidazole mixture.
INTENDED PRODUCT USES: ……………………… Curing agent for epoxy resins.
PRODUCT RESTRICTIONS: ……………………….. None identified.
SDS VERSION: …………………………………………. HTP-286-2024a
MANUFACTURER: EMERGENCY TELEPHONE NUMBERS (24 HRS):
Gougeon Brothers, Inc. Transportation
100 Patterson Ave. CHEMTREC: ……………….. 800-424-9300 (U.S.)
Bay City, MI 48706, U.S.A. 703-527-3887 (International)
Phone: 888-377-6738 or 989-684-7286 Non-transportation
www.prosetepoxy.com Poison Hotline: …………….. 800-222-1222
2. HAZARDS IDENTIFICATION
Classification of Substance or Mixture
Acute toxicity, Oral, Category 4
Acute toxicity, Dermal, Category 4
Acute toxicity Inhalation, Category 4
Skin corrosion/irritation, Category 1B
Skin sensitizer, Category 1
Eye damage/irritation, Category 1
Carcinogenicity, Category 2
Specific target organ toxicity (repeated exposure – oral), Category 2
Acute aquatic toxicity, Category 2
Chronic aquatic toxicity, Category 2
Label Elements
Hazard Pictogram(s):
Signal Word:
DANGER
Hazard Statements:
H302 Harmful if swallowed
H312 Harmful if in contact with skin
H332 Harmful if inhaled
H314 Causes severe skin burns and eye damage
H317 May cause an allergic skin reaction
H351 Suspected of causing cancer
H373 May cause damage to organs through prolonged or repeated exposure
H411 Toxic to aquatic life with long lasting effects
Precautionary Statements:
Prevention
P201 Obtain special instructions before use
P202 Do not handle until all safety precautions have been read and understood
P260 Do not breathe dust/fume/gas/mist/vapors/spray
P264 Wash hands thoroughly after handling
P270 Do not eat, drink or smoke when using this product
P271 Use only outdoors or in a well ventilated area
P272 Contaminated work clothing should not be allowed out of the workplace
P273 Avoid release to the environment
P280 Wear protective gloves/protective clothing/eye protection/face protection
Response
P301 + P330 + 331 IF SWALLOWED: Rinse mouth. Do NOT induce vomiting.
P303 + P361 + P353 IF ON SKIN (or hair): Take off immediately all contaminated clothing. Rinse or wash skin with soap and water (or
shower).
P304 + P340 IF INHALED: Remove person to fresh air and keep comfortable for breathing
PRO-SET
HTP-286 Hardener
Page 2 of 7 Last Revised: 01FEB24
P305 + P351 + P338 + P310 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do.
Continue rinsing.
P308 IF exposed or concerned: Get medical attention/advice.
P310 Immediately call POISON CENTER or doctor.
P313 + P333 If irritation or rash occurs: Get medical attention/advice
P362 + P364 Take off contaminated clothing and wash it before reuse
P391 Collect spillage
Storage
P405 Store locked up.
Disposal
P501 Dispose of contents and container according to local, state, national and international regulations
Other Hazards
None known.
3. COMPOSITION/INFORMATION ON HAZARDOUS INGREDIENTS
INGREDIENT NAME CAS # CONCENTRATION (%)
Methylenebiscyclohexanamine, 4,4′- 1761-71-3 15-40
Isophoronediamine 2855-13-2 10-30
Polymer of epichlorohydrin / bisphenol A and diethylenetriamine 31326-29-1 10-30
Trimethylolpropane polyoxypropylenetriamine 39423-51-3 10-30
Diethylenetriamine 111-40-0 5-10
2-ethyl-4-methylimidazole 931-36-2 1-5
4-Methylimidazole 822-36-6 0.1-1.0
The exact chemical identity and/or exact percentage (concentration) of each ingredient may be held as confidential business information
(CBI). Any ingredient not disclosed in this section may have been determined not to be hazardous to health or the environment, or it may
be present at a level below its disclosure threshold.
4. FIRST AID MEASURES
FIRST AID FOR EYES ……………………………………………………………… SYMPTOMS: Causes eye burns and eye damage. RESPONSE: Flush
immediately with water for at least 15 minutes. Remove contact lenses if present and easy to do. Immediately call a POISON CONTROL CENTER
or doctor.
FIRST AID FOR SKIN ………………………………………………………………. SYMPTOMS: Causes skin burns, redness and irritation. May cause allergic
skin reaction and sensitization. RESPONSE: Immediately wash skin with soap and water. Immediately call a POISON CONTROL CENTER or
doctor.
FIRST AID FOR INHALATION…………………………………………………… SYMPTOMS: Can cause respiratory irritation, shortness of breath or cough.
May give off gas, vapor or mist that is very irritating or corrosive to the respiratory system. May cause allergy, asthma symptoms or breathing
difficulties if inhaled. Serious effects may be delayed following exposure. RESPONSE: Remove to fresh air if effects occur and keep comfortable
for breathing. Immediately call a POISON CONTROL CENTER or doctor if symptoms develop and persist.
FIRST AID FOR INGESTION …………………………………………………….. SYMPTOMS: May cause gastrointestinal irritation or ulceration. May
cause burns of the mouth and throat. RESPONSE: Rinse mouth with water. DO NOT induce vomiting. If vomiting should occur, keep airway
clear. Immediately call POISON CONTROL CENTER or doctor.
Notes to physician: Maintain adequate ventilation and oxygenation of the patient. May cause asthma-like (reactive airways) symptoms.
Bronchodilators, expectorants, antitussives and corticosteroids may be of help. Respiratory symptoms, including pulmonary edema, may be
delayed. Persons receiving significant exposure should be observed 24-48 hours for signs of respiratory distress. Chemical eye burns may require
extended irrigation. Obtain prompt consultation, preferably from an ophthalmologist. If burn is present, treat as any thermal burn, after
decontamination. Due to irritant properties, swallowing may result in burns/ulceration of the mouth, stomach and lower gastrointestinal tract and
subsequent stricture. Although product does not meet criteria for aspiration toxicity, vomitus may cause lung injury. Suggest
endotracheal/esophageal control if lavage is done. No specific antidote. Treatment of exposure should be directed to control of symptoms and the
clinical condition of the patient. Excessive exposure may aggravate preexisting asthma and other respiratory disorders (e.g. emphysema,
bronchitis, reactive airways dysfunction syndrome).
5. FIRE FIGHTING MEASURES
EXTINGUISHING MEDIA: ………………………………………………………… SUITABLE: Foam, carbon dioxide (CO2), dry chemical. NON-SUITABLE:
Direct water stream.
FIRE AND EXPLOSION HAZARDS: ………………………………………….. During a fire, smoke may contain the original materials in addition to
combustion products of varying composition which may be toxic and/or irritating. Combustion products may include, but are not limited to: oxides
of nitrogen, carbon monoxide, carbon dioxide, volatile amines, nitric acid, nitrosamines and ammonia. When mixed with sawdust, wood chips, or
PRO-SET
HTP-286 Hardener
Page 3 of 7 Last Revised: 01FEB24
other cellulosic material, spontaneous combustion can occur under certain conditions. Heat is generated as the air oxidizes the amine. If the heat
is not dissipated quickly enough, it can ignite the sawdust.
SPECIAL FIRE FIGHTING PROCEDURES: ………………………………… Use full-body protective gear and a self-contained breathing apparatus.
Use of water may generate toxic aqueous solutions. Do not allow water run-off from fighting fire to enter drains or other water courses.
6. ACCIDENTAL RELEASE MEASURES
EMERGENCY PROCEURES : ……………………………………………………. Keep unnecessary and unprotected personnel from entering area. Use
appropriate safety and personal protective equipment as indicated in Section 8.
MITIGATION AND CLEAN UP PROCEDURES: …………………………… Stop leak without additional risk. Isolate area. Dike and absorb with inert
material (e.g., sand) and collect in a suitable, closed container. Do not use sawdust, wood chips or other cellulosic materials to absorb the spill, as
the possibility for spontaneous combustion exists. Warm, soapy water may be used to clean residual.
ENVIRONMENTAL PRECAUTIONS: ………………………………………….. Prevent from entering into soil, ditches, sewers, waterways and
groundwater. See Section 12 for environmental impact information.
7. HANDLING AND STORAGE
STORAGE TEMPERATURE (min./max.): …………………………………… 40 F (4 C) / 90 F (32 C).
STORAGE: …………………………………………………………………………….. Store in cool, dry place away from high temperatures and moisture. Keep
container tightly closed. Store in a secure location with restricted access or store locked up.
HANDLING PRECAUT IONS: ……………………………………………………. DO NOT spray apply or heat this product. Use only outdoors or with
adequate ventilation. If ventilation cannot be made adequate, refer to respiratory protection in Section 8. Do not breathe vapors or mists from
heated material. Do not breathe concentrated vapors. Avoid skin and eye contact. Wash thoroughly after handling. When mixed with epoxy
resin this product causes an exothermic reaction, which in large masses, can produce enough heat to damage or ignite surrounding materials and
emit fumes and vapors that vary widely in composition and toxicity. Do not breathe vapors or fumes from uncontrolled exotherming masses.
8. EXPOSURE CONTROLS/PERSONAL PROTECTION
ENGINEERING CONTROLS : ……………………………………………………. Use with adequate general ventilation and/or local ventilation to keep
exposures below established limits.
EYE PROTECTION GUIDELINES: …………………………………………….. Chemical splash-proof goggles or face shield.
SKIN PROTECTION GUIDELINES: ……………………………………………. Wear liquid-proof, chemical resistant gloves (nitrile-butyl rubber, neoprene,
butyl rubber or natural rubber) and full body-covering clothing.
RESPIRATORY PROTECTION GUIDELINES: …………………………….. When ventilation cannot be made adequate enough to keep exposures
below established limits, use a NIOSH approved respirator with an organic vapor cartridge, organic vapor cartridge + P100, or a multi-contaminant
cartridge, depending on specific workplace conditions. Consult with your respirator and cartridge supplier to ensure proper selection of respirator
and cartridge based on ingredients listed in Section 3 and specific workplace conditions. Use and select a respirator according the guidelines
established in OSHA 1910.134 or other applicable respiratory protection standard.
ADDITIONAL PROTECTIVE MEASURES: ………………………………….. Use where there is immediate access to safety shower and emergency eye
wash. Wash thoroughly after use. Contact lens should not be worn when working with this material. Generally speaking, working cleanly and
following basic precautionary measures will greatly minimize the potential for harmful exposure to this product under normal use conditions.
OCCUPATIONAL EXPOSURE LIMITS: ……………………………………… Exposure limits may not be established for this product as a whole. For
established exposure limits of specific ingredients in this product, or other available exposure limit information, refer to the table below.
Ingredient Name CAS# Exposure Limit Information
Methylenebiscyclohexanamine, 4,4 – 1761-71-3 No data available
Isophoronediamine 2855-13-2 No data available
Polymer of epichlorohydrin / bisphenol A and
diethylenetriamine
31326-29-1
Refer to Diethylenetriamine
Trimethylolpropane polyoxypropylenetriamine 39423-51-3 No data available
Diethylenetriamine 111-40-0 1 ppm TWA ACHIH, (SKIN)
2-ethyl-4-methylimidazole 931-36-2 No data available
4-Methylimidazole 822-36-6 No data available
9. PHYSICAL AND CHEMICAL PROPERTIES
PHYSICAL FORM: ………………………………………………………………….. Liquid.
COLOR: ………………………………………………………………………………… Slight amber
ODOR: …………………………………………………………………………………… Ammonia-like
ODOR THRESHOLD: ………………………………………………………………. No data available
pH …………………………………………………………………………………………. 11.80
MELTING POINT / FREEZING POINT ………………………………………… No data available
BOILING POINT (760mm/Hg): ………………………………………………….. > 400 F (204 C) estimated based on similar product.
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FLASH POINT: ……………………………………………………………………….. Estimated > 200
F (93 C) estimated based similar product.
AUTO IGNITION TEMPERATURE ……………………………………………… No data available
LOWER EXPLOSIVE LIMIT (LEL) ……………………………………………… No data available
UPPER EXPLOSIVE LIMIT (UEL) ……………………………………………… No data available
VAPOR PRESSURE ………………………………………………………………… < 1 mmHg @ 20 C (estimated based on ingredient data).
SPECIFIC GRAVITY/DENSITY (water = 1)......................................... 0.98
BULK DENSITY.................................................................................. 8.14 lbs./gal. (0.98 kg/L)
VAPOR DENSITY (air = 1) ................................................................. No data available
EVAPORATIOIN RATE (Butyl Acetate = 1) ....................................... No data available
WATER SOLUBILITY (% BY WT.) ..................................................... No data available
PARTITION COEFFICIENT, n-OCTANOL/WATER (log Pow) ............ No data available
KINEMATIC VISCOSITY: ................................................................... 183 mm
2
/s @ 22
C
DECOMPOSITION TEMPERATURE : ................................................. No data available.
% VOLATILE BY WEIGHT: ................................................................ ASTM 2369-07 was used to determine the Volatile Matter Content of mixed
epoxy resin and hardener. The combined VOC content for the resin and hardener system is listed below.
VOC Content
Resin/Hardener (g/L) (lb/gal)
No data available ........................................................................ 1.84 0.02
10. STABILITY AND REACTIVITY
STABILITY: ........................................................................................ Product is stable at normal temperatures and pressures.
REACTIVITY / HAZARDOUS REACTIONS: ....................................... Product will not react by itself. A mass of more than one pound of product
plus an epoxy resin will cause irreversible polymerization with significant heat buildup and pressure.
INCOMPATIBILITIES: ........................................................................ Avoid organic and mineral acids, oxidizing materials, halogenated organic
compounds (e.g., methylene chloride), nitrosating agents, sodium hyprochlorite. External heating or self-heating could result in rapid temperature
increase and pressure build up. If such a condition were to occur in a drum, the drum could expand and rupture violently.
CONDITIONS TO AVOID: .................................................................. Avoid heat.
DECOMPOSITION PRODUCTS: ........................................................ Very toxic fumes and gases when burned or otherwise heated to
decomposition. Decomposition products may include, but not limited to: oxides of nitrogen, volatile amines, ammonia.
11. TOXICOLOGICAL INFORMATION
Ingredient Name CAS# LD50 Oral LD50 Dermal LC50 Inhalation
Methylenebiscyclohexanamine, 4,4 - 1761-71-3 380 mg/kg >1000 No data
Isophoronediamine 2855-13-2 1030 mg/kg >2000 >5.01 mg/l 4h mist
Polymer of epichlorohydrin / bisphenol A and
diethylenetriamine
31326-29-1
Refer to
Diethylenetriamine
data; ATPE (500
mg/kg)
Refer to
Diethylenetriamine
data; ATPE (1100
mg/kg)
No data available.
Refer to
Diethylenetriamine
data.
Trimethylolpropane polyoxypropylenetriamine 39423-51-3 550 mg/kg >1000 mg/kg No data available
Diethylenetriamine 111-40-0 1620 mg/kg 1090 mg/kg
1
0.07 0.3 mg/L 4hr
aerosol/mist
2-ethyl-4-methylimidazole 931-36-2 731-1000 mg/kg >400 mg/kg No data
4-Methylimidazole 822-36-6 350-751 mg/kg 440 mg/kg No data
1.
NOEL data has been generated for this substance by subjecting rats to an airborne aerosol/mist atmosphere in a test chamber. It has
not been determined that this data directly correlates to an inherent hazard of this product as would be expected under normal,
foreseeable or anticipated conditions of use.
ACUTE TOXICITY: ………………………………………………………………….. No specific toxicity data exists for this mixture. Classification is
based on acute toxicity estimation methods using ingredient data.
Oral: ……………………………………………………………………….. Category 4. Harmful if swallowed . May cause gastrointestinal
irritation or ulceration. May cause burns of the mouth and throat.
Dermal: …………………………………………………………………… Category 4. Harmful in contact with skin.
Inhalation:………………………………………………………………… Category 4. Harmful if inhaled. Can cause respiratory irritation,
shortness of breath or cough. May give off gas, vapor or aerosol that is very irritating or corrosive to the respiratory system. Exposure to
decomposition products can cause serious health hazard. Serious effects may be delayed following exposure.
SKIN CORROSION / IRRITATION: …………………………………………….. Category 1B. Causes severe skin burns. Effects may be
immediate. May cause persistent irritation or dermatitis.
SERIOUS EYE DAMAGE / IRRITATION:…………………………………….. Category 1. Causes serious eye damage. May cause blurred
vision. May cause corneal damage resulting in vision impairment or even blindness.
RESPIRATORY SENSITIZATION: ……………………………………………… Not classified. Based on available data does not meet
classification criteria.
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SKIN SENSITIZATION:…………………………………………………………….. Category 1. May cause allergic skin reaction..
REPRODUCTIVE TOXICITY: …………………………………………………….. Not classified. Based on available data does not meet classification criteria.
MUTAGENICITY: …………………………………………………………………….. Not classified. Based on available data does not meet classification criteria.
CARCINOGENICITY: ……………………………………………………………….. Category 2. Suspected of causing cancer.
A component in this product, 4-Methyleimidazole, present at less than 0.5%, is suspected of causing cancer and is listed by IARC as a Group 2B
carcinogen. Under the conditions of 2-year NTP feed studies, there was no evidence of carcinogenic activity of 4-Methylimidazole in male rats
exposed to 625, 1,250 and 2,500 ppm. There was equivocal evidence of carcinogenic activity of 4-Methylimidazole in female rats based on
increased incidences of mononuclear cell leukemia. There was clear evidence of carcinogenic activity of 4-Methylimidazole in male and female
mice based on increased incidences of alveolar/bronchiolar neoplasms.
SPECIFIC TARGET ORGAN TOXICITY (Single Exposure): ………….. Not classified. Based on available data does not meet classification criteria.
SPECIFIC TARGET ORGAN TOXICITY (Repeated Exposure) : …….. STOT RE Category 2. May cause damage to organs through prolonged or
repeated exposure if swallowed. Repeated ingestion can result in damage to the following organs/biological systems: liver, muscles, skeletal.
ASPIRATION HAZARD : …………………………………………………………… Not classified. Based on available data does not meet classification criteria.
OTHER HEALTH HAZARD INFORMATION : ……………………………….. This product contains a component (diethylenetriamine) that is highly toxic
by inhalation when aerosolized due to spraying or when a mist is formed due to heating. It is advised that exposure not occur to product that is
sprayed or heated. While this product does not meet the classification for a respiratory sensitizer, components of this product can cause
aggravation of existing respiratory conditions, such as asthma.
12. ECOLOGICAL INFORMATION
ACUTE AQUATIC TOXICITY :……………………………………………………. No specific test data available for the mixture. Calculated
Estimate: Aquatic Acute Category 2. Toxic to aquatic life. Avoid release to the environment.
CHRONIC AQUATIC TOXICITY : ……………………………………………….. No specific test data available for the mixture. Calculated
Estimate: Aquatic Chronic Category 2. Toxic to aquatic life with long lasting effects. Avoid release to the environment.
PERSISTANCE AND BIODEGRADABILITY : ………………………………. No specific test data available for the mixture.
MOBILITY IN SOIL: …………………………………………………………………. No specific test data available for the mixture.
ADDITIONAL ECOTOXICITY INFORMATION : …………………………….. In the uncured, liquid state this product may be harmful to
aquatic life with long lasting effects. Prevent release to the environment, sewers and natural waters.
Ingredient CAS# Ecotoxicity Classification Information
Methylenebiscyclohexanamine, 4,4 – 1761-71-3 Acute Aquatic Cat. 2; Chronic Aquatic Cat. 2
Isophoronediamine 2855-13-2 Acute Aquatic Cat. 3; Chronic Aquatic Cat. 3
Polymer of epichlorohydrin / bisphenol A and
diethylenetriamine
31326-29-1
Not classified
Trimethylolpropane polyoxypropylenetriamine 39423-51-3 Acute Aquatic Cat. 2; Chronic Aquatic Cat. 2
Diethylenetriamine 111-40-0 Not classified
2-ethyl-4-methylimidazole 931-36-2 Acute Aquatic Cat. 3; Chronic Aquatic Cat. 3
4-Methylimidazole 822-36-6 Not classified
13. DISPOSAL CONSIDERATIONS
WASTE DISPOSAL METHOD: ………………………………………………….. Evaluation of this product using RCRA criteria shows that it is not a
hazardous waste, either by listing or characteristics, in its purchased form. It is the responsibility of the user to determine proper disposal
methods.
Incinerate, recycle (fuel blending) or reclaim may be preferred methods when conducted in accordance with federal, state and local regulations.
14. TRANSPORTATION INFORMATION
US DOT
UN NUMBER: …………………………………………………………………………. UN 2735
SHIPPING NAME: ……………………………………………………………………. Polyamines, liquid, corrosive, n.o.s.
TECHNICAL SHIPPING NAME: …………………………………………………. Methylenebiscyclohexanamine, 4,4 –
HAZARD CLASS: …………………………………………………………………….. Class 8
PACKING GROUP: ………………………………………………………………….. PG II
MARINE POLLUTANT: …………………………………………………………….. No
CANADA TDG
UN NUMBER: …………………………………………………………………………. UN 2735
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SHIPPING NAME: ……………………………………………………………………. Polyamines, liquid, corrosive, n.o.s.
TECHNICAL SHIPPING NAME: …………………………………………………. Methylenebiscyclohexanamine, 4,4 –
HAZARD CLASS: …………………………………………………………………….. Class 8
PACKING GROUP: ………………………………………………………………….. PG II
MARINE POLLUTANT: …………………………………………………………….. No
IMDG
UN NUMBER: …………………………………………………………………………. UN 2735
SHIPPING NAME: ……………………………………………………………………. Polyamines, liquid, corrosive, n.o.s.
TECHNICAL SHIPPING NAME: …………………………………………………. Methylenebiscyclohexanamine, 4,4 –
HAZARD CLASS: …………………………………………………………………….. Class 8
PACKING GROUP: ………………………………………………………………….. PG II
EmS Number: ………………………………………………………………………… F-A, S-B
MARINE POLLUTANT ……………………………………………………………… Yes
ICAO/IATA
UN NUMBER: …………………………………………………………………………. UN 2735
SHIPPING NAME: ……………………………………………………………………. Polyamines, liquid, corrosive, n.o.s.
TECHNICAL SHIPPING NAME: …………………………………………………. Methylenebiscyclohexanamine, 4,4 –
HAZARD CLASS: …………………………………………………………………….. Class 8
PACKING GROUP: ………………………………………………………………….. PG II
MARINE POLLUTANT: …………………………………………………………….. Yes
15. REGULATORY INFORMATION
COUNTRY INVENTORY LIST STATUS
United States TSCA All ingredients are listed or otherwise compliant.
Europe EINECS or ELINCS All ingredients are listed or otherwise compliant.
Canada CEPA (DSL/NDSL) CAS# 822-36-6 is on NDSL only. All other ingredients are DSL listed.
Australia AICS All ingredients are listed or otherwise compliant.
Japan ENCS All ingredients are listed or otherwise compliant.
South Korea KECI All ingredients are listed or otherwise compliant.
China IECSC All ingredients are listed or otherwise compliant.
Philippines PICCS All ingredients are listed or otherwise compliant.
US EPA TSCA Specific Requirements: …………………………………….. No data available.
Canada WHMIS Confidential Business Information (CBI): ………….. No data available.
US EPA SARA TITLE III Reporting and Notification Requirements:
Subject to Section 302 (TPQ) ……………………………………………… No data available.
Subject to Section 304 (RQ) ……………………………………………….. No data available.
Subject to Section 311 or 312 …………………………………………….. Refer to the health and physical classifications in Section 2.
Subject to Section 313 ………………………………………………………. No data available.
US STATE REGULATORY INFORMATION:
The following chemicals may be specifically regulated by individual states. For details on state regulatory requirements you should contact the
appropriate state agency.
COMPONENT NAME
/CAS NUMBER STATE CODE
4-Methylimidazole
822-36-6
1
CA, PA, NJ
Diethylenetriamine
111-40-0 PA
1.
These substances are known to the state of California to cause cancer or reproductive harm, or both.
16. OTHER INFORMATION
REASON FOR ISSUE:……………………………………………………………… Approval date change.
SDS CONTACT: ……………………………………………………………………… safety@gougeon.com
TITLE: …………………………………………………………………………………… Health, Safety & Environmental Manager
APPROVAL DATE: …………………………………………………………………. 01FEB24
SUPERSEDES DATE: ……………………………………………………………… January 15, 2019
SDS VERSION: ………………………………………………………………………. HTP-286-2024a
OTHER HAZARD INFORMATION AND RATING SYSTEMS:
HMIS RATING NFPA 704 CODES
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HEALTH: 3
FLAMMABILITY: 1
PHYSICAL HAZARD: 0
PERSONAL PROTECTION:
Approximate HMIS and NFPA Risk Ratings Legend:
0 = Low or None; 1 = Slight; 2 = Moderate; 3 = Serious; 4 = Severe
Information in this document is furnished without warranty, expressed or implied, except that it is accurate to the best knowledge of Gougeon Brothers,
Inc. The data on this sheet is related only to the specific material designated herein. Gougeon Brothers, Inc. assumes no legal responsibility for use or
reliance upon these data.
3 0
1
2
by | Sep 27, 2025
SAFETY DATA SHEET
Last Revised: 01FEB24
1. CHEMICAL PRODUCT AND COMPANY IDENTIFICATION
PRODUCT NAME: ……………………………………… PRO-SET
HTP-286 Hardener
APPLICABLE PRODUCT CODES: ………………. HTP-286, HTP-286-1, HTP-286-QC-1, HTP-286-2, HTP-286-QC-2 HTP-286-3, HTP-286-QC-3,
HTP286-4, HTP-286-QC-4, HTP286-5
CHEMICAL FAMILY: ………………………………….. Polyamine-imidazole mixture.
INTENDED PRODUCT USES: ……………………… Curing agent for epoxy resins.
PRODUCT RESTRICTIONS: ……………………….. None identified.
SDS VERSION: …………………………………………. HTP-286-2024a
MANUFACTURER: EMERGENCY TELEPHONE NUMBERS (24 HRS):
Gougeon Brothers, Inc. Transportation
100 Patterson Ave. CHEMTREC: ……………….. 800-424-9300 (U.S.)
Bay City, MI 48706, U.S.A. 703-527-3887 (International)
Phone: 888-377-6738 or 989-684-7286 Non-transportation
www.prosetepoxy.com Poison Hotline: …………….. 800-222-1222
2. HAZARDS IDENTIFICATION
Classification of Substance or Mixture
Acute toxicity, Oral, Category 4
Acute toxicity, Dermal, Category 4
Acute toxicity Inhalation, Category 4
Skin corrosion/irritation, Category 1B
Skin sensitizer, Category 1
Eye damage/irritation, Category 1
Carcinogenicity, Category 2
Specific target organ toxicity (repeated exposure – oral), Category 2
Acute aquatic toxicity, Category 2
Chronic aquatic toxicity, Category 2
Label Elements
Hazard Pictogram(s):
Signal Word:
DANGER
Hazard Statements:
H302 Harmful if swallowed
H312 Harmful if in contact with skin
H332 Harmful if inhaled
H314 Causes severe skin burns and eye damage
H317 May cause an allergic skin reaction
H351 Suspected of causing cancer
H373 May cause damage to organs through prolonged or repeated exposure
H411 Toxic to aquatic life with long lasting effects
Precautionary Statements:
Prevention
P201 Obtain special instructions before use
P202 Do not handle until all safety precautions have been read and understood
P260 Do not breathe dust/fume/gas/mist/vapors/spray
P264 Wash hands thoroughly after handling
P270 Do not eat, drink or smoke when using this product
P271 Use only outdoors or in a well ventilated area
P272 Contaminated work clothing should not be allowed out of the workplace
P273 Avoid release to the environment
P280 Wear protective gloves/protective clothing/eye protection/face protection
Response
P301 + P330 + 331 IF SWALLOWED: Rinse mouth. Do NOT induce vomiting.
P303 + P361 + P353 IF ON SKIN (or hair): Take off immediately all contaminated clothing. Rinse or wash skin with soap and water (or
shower).
P304 + P340 IF INHALED: Remove person to fresh air and keep comfortable for breathing
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P305 + P351 + P338 + P310 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do.
Continue rinsing.
P308 IF exposed or concerned: Get medical attention/advice.
P310 Immediately call POISON CENTER or doctor.
P313 + P333 If irritation or rash occurs: Get medical attention/advice
P362 + P364 Take off contaminated clothing and wash it before reuse
P391 Collect spillage
Storage
P405 Store locked up.
Disposal
P501 Dispose of contents and container according to local, state, national and international regulations
Other Hazards
None known.
3. COMPOSITION/INFORMATION ON HAZARDOUS INGREDIENTS
INGREDIENT NAME CAS # CONCENTRATION (%)
Methylenebiscyclohexanamine, 4,4′- 1761-71-3 15-40
Isophoronediamine 2855-13-2 10-30
Polymer of epichlorohydrin / bisphenol A and diethylenetriamine 31326-29-1 10-30
Trimethylolpropane polyoxypropylenetriamine 39423-51-3 10-30
Diethylenetriamine 111-40-0 5-10
2-ethyl-4-methylimidazole 931-36-2 1-5
4-Methylimidazole 822-36-6 0.1-1.0
The exact chemical identity and/or exact percentage (concentration) of each ingredient may be held as confidential business information
(CBI). Any ingredient not disclosed in this section may have been determined not to be hazardous to health or the environment, or it may
be present at a level below its disclosure threshold.
4. FIRST AID MEASURES
FIRST AID FOR EYES ……………………………………………………………… SYMPTOMS: Causes eye burns and eye damage. RESPONSE: Flush
immediately with water for at least 15 minutes. Remove contact lenses if present and easy to do. Immediately call a POISON CONTROL CENTER
or doctor.
FIRST AID FOR SKIN ………………………………………………………………. SYMPTOMS: Causes skin burns, redness and irritation. May cause allergic
skin reaction and sensitization. RESPONSE: Immediately wash skin with soap and water. Immediately call a POISON CONTROL CENTER or
doctor.
FIRST AID FOR INHALATION…………………………………………………… SYMPTOMS: Can cause respiratory irritation, shortness of breath or cough.
May give off gas, vapor or mist that is very irritating or corrosive to the respiratory system. May cause allergy, asthma symptoms or breathing
difficulties if inhaled. Serious effects may be delayed following exposure. RESPONSE: Remove to fresh air if effects occur and keep comfortable
for breathing. Immediately call a POISON CONTROL CENTER or doctor if symptoms develop and persist.
FIRST AID FOR INGESTION …………………………………………………….. SYMPTOMS: May cause gastrointestinal irritation or ulceration. May
cause burns of the mouth and throat. RESPONSE: Rinse mouth with water. DO NOT induce vomiting. If vomiting should occur, keep airway
clear. Immediately call POISON CONTROL CENTER or doctor.
Notes to physician: Maintain adequate ventilation and oxygenation of the patient. May cause asthma-like (reactive airways) symptoms.
Bronchodilators, expectorants, antitussives and corticosteroids may be of help. Respiratory symptoms, including pulmonary edema, may be
delayed. Persons receiving significant exposure should be observed 24-48 hours for signs of respiratory distress. Chemical eye burns may require
extended irrigation. Obtain prompt consultation, preferably from an ophthalmologist. If burn is present, treat as any thermal burn, after
decontamination. Due to irritant properties, swallowing may result in burns/ulceration of the mouth, stomach and lower gastrointestinal tract and
subsequent stricture. Although product does not meet criteria for aspiration toxicity, vomitus may cause lung injury. Suggest
endotracheal/esophageal control if lavage is done. No specific antidote. Treatment of exposure should be directed to control of symptoms and the
clinical condition of the patient. Excessive exposure may aggravate preexisting asthma and other respiratory disorders (e.g. emphysema,
bronchitis, reactive airways dysfunction syndrome).
5. FIRE FIGHTING MEASURES
EXTINGUISHING MEDIA: ………………………………………………………… SUITABLE: Foam, carbon dioxide (CO2), dry chemical. NON-SUITABLE:
Direct water stream.
FIRE AND EXPLOSION HAZARDS: ………………………………………….. During a fire, smoke may contain the original materials in addition to
combustion products of varying composition which may be toxic and/or irritating. Combustion products may include, but are not limited to: oxides
of nitrogen, carbon monoxide, carbon dioxide, volatile amines, nitric acid, nitrosamines and ammonia. When mixed with sawdust, wood chips, or
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other cellulosic material, spontaneous combustion can occur under certain conditions. Heat is generated as the air oxidizes the amine. If the heat
is not dissipated quickly enough, it can ignite the sawdust.
SPECIAL FIRE FIGHTING PROCEDURES: ………………………………… Use full-body protective gear and a self-contained breathing apparatus.
Use of water may generate toxic aqueous solutions. Do not allow water run-off from fighting fire to enter drains or other water courses.
6. ACCIDENTAL RELEASE MEASURES
EMERGENCY PROCEURES : ……………………………………………………. Keep unnecessary and unprotected personnel from entering area. Use
appropriate safety and personal protective equipment as indicated in Section 8.
MITIGATION AND CLEAN UP PROCEDURES: …………………………… Stop leak without additional risk. Isolate area. Dike and absorb with inert
material (e.g., sand) and collect in a suitable, closed container. Do not use sawdust, wood chips or other cellulosic materials to absorb the spill, as
the possibility for spontaneous combustion exists. Warm, soapy water may be used to clean residual.
ENVIRONMENTAL PRECAUTIONS: ………………………………………….. Prevent from entering into soil, ditches, sewers, waterways and
groundwater. See Section 12 for environmental impact information.
7. HANDLING AND STORAGE
STORAGE TEMPERATURE (min./max.): …………………………………… 40 F (4 C) / 90 F (32 C).
STORAGE: …………………………………………………………………………….. Store in cool, dry place away from high temperatures and moisture. Keep
container tightly closed. Store in a secure location with restricted access or store locked up.
HANDLING PRECAUT IONS: ……………………………………………………. DO NOT spray apply or heat this product. Use only outdoors or with
adequate ventilation. If ventilation cannot be made adequate, refer to respiratory protection in Section 8. Do not breathe vapors or mists from
heated material. Do not breathe concentrated vapors. Avoid skin and eye contact. Wash thoroughly after handling. When mixed with epoxy
resin this product causes an exothermic reaction, which in large masses, can produce enough heat to damage or ignite surrounding materials and
emit fumes and vapors that vary widely in composition and toxicity. Do not breathe vapors or fumes from uncontrolled exotherming masses.
8. EXPOSURE CONTROLS/PERSONAL PROTECTION
ENGINEERING CONTROLS : ……………………………………………………. Use with adequate general ventilation and/or local ventilation to keep
exposures below established limits.
EYE PROTECTION GUIDELINES: …………………………………………….. Chemical splash-proof goggles or face shield.
SKIN PROTECTION GUIDELINES: ……………………………………………. Wear liquid-proof, chemical resistant gloves (nitrile-butyl rubber, neoprene,
butyl rubber or natural rubber) and full body-covering clothing.
RESPIRATORY PROTECTION GUIDELINES: …………………………….. When ventilation cannot be made adequate enough to keep exposures
below established limits, use a NIOSH approved respirator with an organic vapor cartridge, organic vapor cartridge + P100, or a multi-contaminant
cartridge, depending on specific workplace conditions. Consult with your respirator and cartridge supplier to ensure proper selection of respirator
and cartridge based on ingredients listed in Section 3 and specific workplace conditions. Use and select a respirator according the guidelines
established in OSHA 1910.134 or other applicable respiratory protection standard.
ADDITIONAL PROTECTIVE MEASURES: ………………………………….. Use where there is immediate access to safety shower and emergency eye
wash. Wash thoroughly after use. Contact lens should not be worn when working with this material. Generally speaking, working cleanly and
following basic precautionary measures will greatly minimize the potential for harmful exposure to this product under normal use conditions.
OCCUPATIONAL EXPOSURE LIMITS: ……………………………………… Exposure limits may not be established for this product as a whole. For
established exposure limits of specific ingredients in this product, or other available exposure limit information, refer to the table below.
Ingredient Name CAS# Exposure Limit Information
Methylenebiscyclohexanamine, 4,4 – 1761-71-3 No data available
Isophoronediamine 2855-13-2 No data available
Polymer of epichlorohydrin / bisphenol A and
diethylenetriamine
31326-29-1
Refer to Diethylenetriamine
Trimethylolpropane polyoxypropylenetriamine 39423-51-3 No data available
Diethylenetriamine 111-40-0 1 ppm TWA ACHIH, (SKIN)
2-ethyl-4-methylimidazole 931-36-2 No data available
4-Methylimidazole 822-36-6 No data available
9. PHYSICAL AND CHEMICAL PROPERTIES
PHYSICAL FORM: ………………………………………………………………….. Liquid.
COLOR: ………………………………………………………………………………… Slight amber
ODOR: …………………………………………………………………………………… Ammonia-like
ODOR THRESHOLD: ………………………………………………………………. No data available
pH …………………………………………………………………………………………. 11.80
MELTING POINT / FREEZING POINT ………………………………………… No data available
BOILING POINT (760mm/Hg): ………………………………………………….. > 400 F (204 C) estimated based on similar product.
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HTP-286 Hardener
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FLASH POINT: ……………………………………………………………………….. Estimated > 200
F (93 C) estimated based similar product.
AUTO IGNITION TEMPERATURE ……………………………………………… No data available
LOWER EXPLOSIVE LIMIT (LEL) ……………………………………………… No data available
UPPER EXPLOSIVE LIMIT (UEL) ……………………………………………… No data available
VAPOR PRESSURE ………………………………………………………………… < 1 mmHg @ 20 C (estimated based on ingredient data).
SPECIFIC GRAVITY/DENSITY (water = 1)......................................... 0.98
BULK DENSITY.................................................................................. 8.14 lbs./gal. (0.98 kg/L)
VAPOR DENSITY (air = 1) ................................................................. No data available
EVAPORATIOIN RATE (Butyl Acetate = 1) ....................................... No data available
WATER SOLUBILITY (% BY WT.) ..................................................... No data available
PARTITION COEFFICIENT, n-OCTANOL/WATER (log Pow) ............ No data available
KINEMATIC VISCOSITY: ................................................................... 183 mm
2
/s @ 22
C
DECOMPOSITION TEMPERATURE : ................................................. No data available.
% VOLATILE BY WEIGHT: ................................................................ ASTM 2369-07 was used to determine the Volatile Matter Content of mixed
epoxy resin and hardener. The combined VOC content for the resin and hardener system is listed below.
VOC Content
Resin/Hardener (g/L) (lb/gal)
No data available ........................................................................ 1.84 0.02
10. STABILITY AND REACTIVITY
STABILITY: ........................................................................................ Product is stable at normal temperatures and pressures.
REACTIVITY / HAZARDOUS REACTIONS: ....................................... Product will not react by itself. A mass of more than one pound of product
plus an epoxy resin will cause irreversible polymerization with significant heat buildup and pressure.
INCOMPATIBILITIES: ........................................................................ Avoid organic and mineral acids, oxidizing materials, halogenated organic
compounds (e.g., methylene chloride), nitrosating agents, sodium hyprochlorite. External heating or self-heating could result in rapid temperature
increase and pressure build up. If such a condition were to occur in a drum, the drum could expand and rupture violently.
CONDITIONS TO AVOID: .................................................................. Avoid heat.
DECOMPOSITION PRODUCTS: ........................................................ Very toxic fumes and gases when burned or otherwise heated to
decomposition. Decomposition products may include, but not limited to: oxides of nitrogen, volatile amines, ammonia.
11. TOXICOLOGICAL INFORMATION
Ingredient Name CAS# LD50 Oral LD50 Dermal LC50 Inhalation
Methylenebiscyclohexanamine, 4,4 - 1761-71-3 380 mg/kg >1000 No data
Isophoronediamine 2855-13-2 1030 mg/kg >2000 >5.01 mg/l 4h mist
Polymer of epichlorohydrin / bisphenol A and
diethylenetriamine
31326-29-1
Refer to
Diethylenetriamine
data; ATPE (500
mg/kg)
Refer to
Diethylenetriamine
data; ATPE (1100
mg/kg)
No data available.
Refer to
Diethylenetriamine
data.
Trimethylolpropane polyoxypropylenetriamine 39423-51-3 550 mg/kg >1000 mg/kg No data available
Diethylenetriamine 111-40-0 1620 mg/kg 1090 mg/kg
1
0.07 0.3 mg/L 4hr
aerosol/mist
2-ethyl-4-methylimidazole 931-36-2 731-1000 mg/kg >400 mg/kg No data
4-Methylimidazole 822-36-6 350-751 mg/kg 440 mg/kg No data
1.
NOEL data has been generated for this substance by subjecting rats to an airborne aerosol/mist atmosphere in a test chamber. It has
not been determined that this data directly correlates to an inherent hazard of this product as would be expected under normal,
foreseeable or anticipated conditions of use.
ACUTE TOXICITY: ………………………………………………………………….. No specific toxicity data exists for this mixture. Classification is
based on acute toxicity estimation methods using ingredient data.
Oral: ……………………………………………………………………….. Category 4. Harmful if swallowed . May cause gastrointestinal
irritation or ulceration. May cause burns of the mouth and throat.
Dermal: …………………………………………………………………… Category 4. Harmful in contact with skin.
Inhalation:………………………………………………………………… Category 4. Harmful if inhaled. Can cause respiratory irritation,
shortness of breath or cough. May give off gas, vapor or aerosol that is very irritating or corrosive to the respiratory system. Exposure to
decomposition products can cause serious health hazard. Serious effects may be delayed following exposure.
SKIN CORROSION / IRRITATION: …………………………………………….. Category 1B. Causes severe skin burns. Effects may be
immediate. May cause persistent irritation or dermatitis.
SERIOUS EYE DAMAGE / IRRITATION:…………………………………….. Category 1. Causes serious eye damage. May cause blurred
vision. May cause corneal damage resulting in vision impairment or even blindness.
RESPIRATORY SENSITIZATION: ……………………………………………… Not classified. Based on available data does not meet
classification criteria.
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SKIN SENSITIZATION:…………………………………………………………….. Category 1. May cause allergic skin reaction..
REPRODUCTIVE TOXICITY: …………………………………………………….. Not classified. Based on available data does not meet classification criteria.
MUTAGENICITY: …………………………………………………………………….. Not classified. Based on available data does not meet classification criteria.
CARCINOGENICITY: ……………………………………………………………….. Category 2. Suspected of causing cancer.
A component in this product, 4-Methyleimidazole, present at less than 0.5%, is suspected of causing cancer and is listed by IARC as a Group 2B
carcinogen. Under the conditions of 2-year NTP feed studies, there was no evidence of carcinogenic activity of 4-Methylimidazole in male rats
exposed to 625, 1,250 and 2,500 ppm. There was equivocal evidence of carcinogenic activity of 4-Methylimidazole in female rats based on
increased incidences of mononuclear cell leukemia. There was clear evidence of carcinogenic activity of 4-Methylimidazole in male and female
mice based on increased incidences of alveolar/bronchiolar neoplasms.
SPECIFIC TARGET ORGAN TOXICITY (Single Exposure): ………….. Not classified. Based on available data does not meet classification criteria.
SPECIFIC TARGET ORGAN TOXICITY (Repeated Exposure) : …….. STOT RE Category 2. May cause damage to organs through prolonged or
repeated exposure if swallowed. Repeated ingestion can result in damage to the following organs/biological systems: liver, muscles, skeletal.
ASPIRATION HAZARD : …………………………………………………………… Not classified. Based on available data does not meet classification criteria.
OTHER HEALTH HAZARD INFORMATION : ……………………………….. This product contains a component (diethylenetriamine) that is highly toxic
by inhalation when aerosolized due to spraying or when a mist is formed due to heating. It is advised that exposure not occur to product that is
sprayed or heated. While this product does not meet the classification for a respiratory sensitizer, components of this product can cause
aggravation of existing respiratory conditions, such as asthma.
12. ECOLOGICAL INFORMATION
ACUTE AQUATIC TOXICITY :……………………………………………………. No specific test data available for the mixture. Calculated
Estimate: Aquatic Acute Category 2. Toxic to aquatic life. Avoid release to the environment.
CHRONIC AQUATIC TOXICITY : ……………………………………………….. No specific test data available for the mixture. Calculated
Estimate: Aquatic Chronic Category 2. Toxic to aquatic life with long lasting effects. Avoid release to the environment.
PERSISTANCE AND BIODEGRADABILITY : ………………………………. No specific test data available for the mixture.
MOBILITY IN SOIL: …………………………………………………………………. No specific test data available for the mixture.
ADDITIONAL ECOTOXICITY INFORMATION : …………………………….. In the uncured, liquid state this product may be harmful to
aquatic life with long lasting effects. Prevent release to the environment, sewers and natural waters.
Ingredient CAS# Ecotoxicity Classification Information
Methylenebiscyclohexanamine, 4,4 – 1761-71-3 Acute Aquatic Cat. 2; Chronic Aquatic Cat. 2
Isophoronediamine 2855-13-2 Acute Aquatic Cat. 3; Chronic Aquatic Cat. 3
Polymer of epichlorohydrin / bisphenol A and
diethylenetriamine
31326-29-1
Not classified
Trimethylolpropane polyoxypropylenetriamine 39423-51-3 Acute Aquatic Cat. 2; Chronic Aquatic Cat. 2
Diethylenetriamine 111-40-0 Not classified
2-ethyl-4-methylimidazole 931-36-2 Acute Aquatic Cat. 3; Chronic Aquatic Cat. 3
4-Methylimidazole 822-36-6 Not classified
13. DISPOSAL CONSIDERATIONS
WASTE DISPOSAL METHOD: ………………………………………………….. Evaluation of this product using RCRA criteria shows that it is not a
hazardous waste, either by listing or characteristics, in its purchased form. It is the responsibility of the user to determine proper disposal
methods.
Incinerate, recycle (fuel blending) or reclaim may be preferred methods when conducted in accordance with federal, state and local regulations.
14. TRANSPORTATION INFORMATION
US DOT
UN NUMBER: …………………………………………………………………………. UN 2735
SHIPPING NAME: ……………………………………………………………………. Polyamines, liquid, corrosive, n.o.s.
TECHNICAL SHIPPING NAME: …………………………………………………. Methylenebiscyclohexanamine, 4,4 –
HAZARD CLASS: …………………………………………………………………….. Class 8
PACKING GROUP: ………………………………………………………………….. PG II
MARINE POLLUTANT: …………………………………………………………….. No
CANADA TDG
UN NUMBER: …………………………………………………………………………. UN 2735
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SHIPPING NAME: ……………………………………………………………………. Polyamines, liquid, corrosive, n.o.s.
TECHNICAL SHIPPING NAME: …………………………………………………. Methylenebiscyclohexanamine, 4,4 –
HAZARD CLASS: …………………………………………………………………….. Class 8
PACKING GROUP: ………………………………………………………………….. PG II
MARINE POLLUTANT: …………………………………………………………….. No
IMDG
UN NUMBER: …………………………………………………………………………. UN 2735
SHIPPING NAME: ……………………………………………………………………. Polyamines, liquid, corrosive, n.o.s.
TECHNICAL SHIPPING NAME: …………………………………………………. Methylenebiscyclohexanamine, 4,4 –
HAZARD CLASS: …………………………………………………………………….. Class 8
PACKING GROUP: ………………………………………………………………….. PG II
EmS Number: ………………………………………………………………………… F-A, S-B
MARINE POLLUTANT ……………………………………………………………… Yes
ICAO/IATA
UN NUMBER: …………………………………………………………………………. UN 2735
SHIPPING NAME: ……………………………………………………………………. Polyamines, liquid, corrosive, n.o.s.
TECHNICAL SHIPPING NAME: …………………………………………………. Methylenebiscyclohexanamine, 4,4 –
HAZARD CLASS: …………………………………………………………………….. Class 8
PACKING GROUP: ………………………………………………………………….. PG II
MARINE POLLUTANT: …………………………………………………………….. Yes
15. REGULATORY INFORMATION
COUNTRY INVENTORY LIST STATUS
United States TSCA All ingredients are listed or otherwise compliant.
Europe EINECS or ELINCS All ingredients are listed or otherwise compliant.
Canada CEPA (DSL/NDSL) CAS# 822-36-6 is on NDSL only. All other ingredients are DSL listed.
Australia AICS All ingredients are listed or otherwise compliant.
Japan ENCS All ingredients are listed or otherwise compliant.
South Korea KECI All ingredients are listed or otherwise compliant.
China IECSC All ingredients are listed or otherwise compliant.
Philippines PICCS All ingredients are listed or otherwise compliant.
US EPA TSCA Specific Requirements: …………………………………….. No data available.
Canada WHMIS Confidential Business Information (CBI): ………….. No data available.
US EPA SARA TITLE III Reporting and Notification Requirements:
Subject to Section 302 (TPQ) ……………………………………………… No data available.
Subject to Section 304 (RQ) ……………………………………………….. No data available.
Subject to Section 311 or 312 …………………………………………….. Refer to the health and physical classifications in Section 2.
Subject to Section 313 ………………………………………………………. No data available.
US STATE REGULATORY INFORMATION:
The following chemicals may be specifically regulated by individual states. For details on state regulatory requirements you should contact the
appropriate state agency.
COMPONENT NAME
/CAS NUMBER STATE CODE
4-Methylimidazole
822-36-6
1
CA, PA, NJ
Diethylenetriamine
111-40-0 PA
1.
These substances are known to the state of California to cause cancer or reproductive harm, or both.
16. OTHER INFORMATION
REASON FOR ISSUE:……………………………………………………………… Approval date change.
SDS CONTACT: ……………………………………………………………………… safety@gougeon.com
TITLE: …………………………………………………………………………………… Health, Safety & Environmental Manager
APPROVAL DATE: …………………………………………………………………. 01FEB24
SUPERSEDES DATE: ……………………………………………………………… January 15, 2019
SDS VERSION: ………………………………………………………………………. HTP-286-2024a
OTHER HAZARD INFORMATION AND RATING SYSTEMS:
HMIS RATING NFPA 704 CODES
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HTP-286 Hardener
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HEALTH: 3
FLAMMABILITY: 1
PHYSICAL HAZARD: 0
PERSONAL PROTECTION:
Approximate HMIS and NFPA Risk Ratings Legend:
0 = Low or None; 1 = Slight; 2 = Moderate; 3 = Serious; 4 = Severe
Information in this document is furnished without warranty, expressed or implied, except that it is accurate to the best knowledge of Gougeon Brothers,
Inc. The data on this sheet is related only to the specific material designated herein. Gougeon Brothers, Inc. assumes no legal responsibility for use or
reliance upon these data.
3 0
1
2
by | Sep 27, 2025
SAFETY DATA SHEET
Last Revised: 01FEB24
1. CHEMICAL PRODUCT AND COMPANY IDENTIFICATION
PRODUCT NAME: ……………………………………… PRO-SET
HTP-286 Hardener
APPLICABLE PRODUCT CODES: ………………. HTP-286, HTP-286-1, HTP-286-QC-1, HTP-286-2, HTP-286-QC-2 HTP-286-3, HTP-286-QC-3,
HTP286-4, HTP-286-QC-4, HTP286-5
CHEMICAL FAMILY: ………………………………….. Polyamine-imidazole mixture.
INTENDED PRODUCT USES: ……………………… Curing agent for epoxy resins.
PRODUCT RESTRICTIONS: ……………………….. None identified.
SDS VERSION: …………………………………………. HTP-286-2024a
MANUFACTURER: EMERGENCY TELEPHONE NUMBERS (24 HRS):
Gougeon Brothers, Inc. Transportation
100 Patterson Ave. CHEMTREC: ……………….. 800-424-9300 (U.S.)
Bay City, MI 48706, U.S.A. 703-527-3887 (International)
Phone: 888-377-6738 or 989-684-7286 Non-transportation
www.prosetepoxy.com Poison Hotline: …………….. 800-222-1222
2. HAZARDS IDENTIFICATION
Classification of Substance or Mixture
Acute toxicity, Oral, Category 4
Acute toxicity, Dermal, Category 4
Acute toxicity Inhalation, Category 4
Skin corrosion/irritation, Category 1B
Skin sensitizer, Category 1
Eye damage/irritation, Category 1
Carcinogenicity, Category 2
Specific target organ toxicity (repeated exposure – oral), Category 2
Acute aquatic toxicity, Category 2
Chronic aquatic toxicity, Category 2
Label Elements
Hazard Pictogram(s):
Signal Word:
DANGER
Hazard Statements:
H302 Harmful if swallowed
H312 Harmful if in contact with skin
H332 Harmful if inhaled
H314 Causes severe skin burns and eye damage
H317 May cause an allergic skin reaction
H351 Suspected of causing cancer
H373 May cause damage to organs through prolonged or repeated exposure
H411 Toxic to aquatic life with long lasting effects
Precautionary Statements:
Prevention
P201 Obtain special instructions before use
P202 Do not handle until all safety precautions have been read and understood
P260 Do not breathe dust/fume/gas/mist/vapors/spray
P264 Wash hands thoroughly after handling
P270 Do not eat, drink or smoke when using this product
P271 Use only outdoors or in a well ventilated area
P272 Contaminated work clothing should not be allowed out of the workplace
P273 Avoid release to the environment
P280 Wear protective gloves/protective clothing/eye protection/face protection
Response
P301 + P330 + 331 IF SWALLOWED: Rinse mouth. Do NOT induce vomiting.
P303 + P361 + P353 IF ON SKIN (or hair): Take off immediately all contaminated clothing. Rinse or wash skin with soap and water (or
shower).
P304 + P340 IF INHALED: Remove person to fresh air and keep comfortable for breathing
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P305 + P351 + P338 + P310 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do.
Continue rinsing.
P308 IF exposed or concerned: Get medical attention/advice.
P310 Immediately call POISON CENTER or doctor.
P313 + P333 If irritation or rash occurs: Get medical attention/advice
P362 + P364 Take off contaminated clothing and wash it before reuse
P391 Collect spillage
Storage
P405 Store locked up.
Disposal
P501 Dispose of contents and container according to local, state, national and international regulations
Other Hazards
None known.
3. COMPOSITION/INFORMATION ON HAZARDOUS INGREDIENTS
INGREDIENT NAME CAS # CONCENTRATION (%)
Methylenebiscyclohexanamine, 4,4′- 1761-71-3 15-40
Isophoronediamine 2855-13-2 10-30
Polymer of epichlorohydrin / bisphenol A and diethylenetriamine 31326-29-1 10-30
Trimethylolpropane polyoxypropylenetriamine 39423-51-3 10-30
Diethylenetriamine 111-40-0 5-10
2-ethyl-4-methylimidazole 931-36-2 1-5
4-Methylimidazole 822-36-6 0.1-1.0
The exact chemical identity and/or exact percentage (concentration) of each ingredient may be held as confidential business information
(CBI). Any ingredient not disclosed in this section may have been determined not to be hazardous to health or the environment, or it may
be present at a level below its disclosure threshold.
4. FIRST AID MEASURES
FIRST AID FOR EYES ……………………………………………………………… SYMPTOMS: Causes eye burns and eye damage. RESPONSE: Flush
immediately with water for at least 15 minutes. Remove contact lenses if present and easy to do. Immediately call a POISON CONTROL CENTER
or doctor.
FIRST AID FOR SKIN ………………………………………………………………. SYMPTOMS: Causes skin burns, redness and irritation. May cause allergic
skin reaction and sensitization. RESPONSE: Immediately wash skin with soap and water. Immediately call a POISON CONTROL CENTER or
doctor.
FIRST AID FOR INHALATION…………………………………………………… SYMPTOMS: Can cause respiratory irritation, shortness of breath or cough.
May give off gas, vapor or mist that is very irritating or corrosive to the respiratory system. May cause allergy, asthma symptoms or breathing
difficulties if inhaled. Serious effects may be delayed following exposure. RESPONSE: Remove to fresh air if effects occur and keep comfortable
for breathing. Immediately call a POISON CONTROL CENTER or doctor if symptoms develop and persist.
FIRST AID FOR INGESTION …………………………………………………….. SYMPTOMS: May cause gastrointestinal irritation or ulceration. May
cause burns of the mouth and throat. RESPONSE: Rinse mouth with water. DO NOT induce vomiting. If vomiting should occur, keep airway
clear. Immediately call POISON CONTROL CENTER or doctor.
Notes to physician: Maintain adequate ventilation and oxygenation of the patient. May cause asthma-like (reactive airways) symptoms.
Bronchodilators, expectorants, antitussives and corticosteroids may be of help. Respiratory symptoms, including pulmonary edema, may be
delayed. Persons receiving significant exposure should be observed 24-48 hours for signs of respiratory distress. Chemical eye burns may require
extended irrigation. Obtain prompt consultation, preferably from an ophthalmologist. If burn is present, treat as any thermal burn, after
decontamination. Due to irritant properties, swallowing may result in burns/ulceration of the mouth, stomach and lower gastrointestinal tract and
subsequent stricture. Although product does not meet criteria for aspiration toxicity, vomitus may cause lung injury. Suggest
endotracheal/esophageal control if lavage is done. No specific antidote. Treatment of exposure should be directed to control of symptoms and the
clinical condition of the patient. Excessive exposure may aggravate preexisting asthma and other respiratory disorders (e.g. emphysema,
bronchitis, reactive airways dysfunction syndrome).
5. FIRE FIGHTING MEASURES
EXTINGUISHING MEDIA: ………………………………………………………… SUITABLE: Foam, carbon dioxide (CO2), dry chemical. NON-SUITABLE:
Direct water stream.
FIRE AND EXPLOSION HAZARDS: ………………………………………….. During a fire, smoke may contain the original materials in addition to
combustion products of varying composition which may be toxic and/or irritating. Combustion products may include, but are not limited to: oxides
of nitrogen, carbon monoxide, carbon dioxide, volatile amines, nitric acid, nitrosamines and ammonia. When mixed with sawdust, wood chips, or
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other cellulosic material, spontaneous combustion can occur under certain conditions. Heat is generated as the air oxidizes the amine. If the heat
is not dissipated quickly enough, it can ignite the sawdust.
SPECIAL FIRE FIGHTING PROCEDURES: ………………………………… Use full-body protective gear and a self-contained breathing apparatus.
Use of water may generate toxic aqueous solutions. Do not allow water run-off from fighting fire to enter drains or other water courses.
6. ACCIDENTAL RELEASE MEASURES
EMERGENCY PROCEURES : ……………………………………………………. Keep unnecessary and unprotected personnel from entering area. Use
appropriate safety and personal protective equipment as indicated in Section 8.
MITIGATION AND CLEAN UP PROCEDURES: …………………………… Stop leak without additional risk. Isolate area. Dike and absorb with inert
material (e.g., sand) and collect in a suitable, closed container. Do not use sawdust, wood chips or other cellulosic materials to absorb the spill, as
the possibility for spontaneous combustion exists. Warm, soapy water may be used to clean residual.
ENVIRONMENTAL PRECAUTIONS: ………………………………………….. Prevent from entering into soil, ditches, sewers, waterways and
groundwater. See Section 12 for environmental impact information.
7. HANDLING AND STORAGE
STORAGE TEMPERATURE (min./max.): …………………………………… 40 F (4 C) / 90 F (32 C).
STORAGE: …………………………………………………………………………….. Store in cool, dry place away from high temperatures and moisture. Keep
container tightly closed. Store in a secure location with restricted access or store locked up.
HANDLING PRECAUT IONS: ……………………………………………………. DO NOT spray apply or heat this product. Use only outdoors or with
adequate ventilation. If ventilation cannot be made adequate, refer to respiratory protection in Section 8. Do not breathe vapors or mists from
heated material. Do not breathe concentrated vapors. Avoid skin and eye contact. Wash thoroughly after handling. When mixed with epoxy
resin this product causes an exothermic reaction, which in large masses, can produce enough heat to damage or ignite surrounding materials and
emit fumes and vapors that vary widely in composition and toxicity. Do not breathe vapors or fumes from uncontrolled exotherming masses.
8. EXPOSURE CONTROLS/PERSONAL PROTECTION
ENGINEERING CONTROLS : ……………………………………………………. Use with adequate general ventilation and/or local ventilation to keep
exposures below established limits.
EYE PROTECTION GUIDELINES: …………………………………………….. Chemical splash-proof goggles or face shield.
SKIN PROTECTION GUIDELINES: ……………………………………………. Wear liquid-proof, chemical resistant gloves (nitrile-butyl rubber, neoprene,
butyl rubber or natural rubber) and full body-covering clothing.
RESPIRATORY PROTECTION GUIDELINES: …………………………….. When ventilation cannot be made adequate enough to keep exposures
below established limits, use a NIOSH approved respirator with an organic vapor cartridge, organic vapor cartridge + P100, or a multi-contaminant
cartridge, depending on specific workplace conditions. Consult with your respirator and cartridge supplier to ensure proper selection of respirator
and cartridge based on ingredients listed in Section 3 and specific workplace conditions. Use and select a respirator according the guidelines
established in OSHA 1910.134 or other applicable respiratory protection standard.
ADDITIONAL PROTECTIVE MEASURES: ………………………………….. Use where there is immediate access to safety shower and emergency eye
wash. Wash thoroughly after use. Contact lens should not be worn when working with this material. Generally speaking, working cleanly and
following basic precautionary measures will greatly minimize the potential for harmful exposure to this product under normal use conditions.
OCCUPATIONAL EXPOSURE LIMITS: ……………………………………… Exposure limits may not be established for this product as a whole. For
established exposure limits of specific ingredients in this product, or other available exposure limit information, refer to the table below.
Ingredient Name CAS# Exposure Limit Information
Methylenebiscyclohexanamine, 4,4 – 1761-71-3 No data available
Isophoronediamine 2855-13-2 No data available
Polymer of epichlorohydrin / bisphenol A and
diethylenetriamine
31326-29-1
Refer to Diethylenetriamine
Trimethylolpropane polyoxypropylenetriamine 39423-51-3 No data available
Diethylenetriamine 111-40-0 1 ppm TWA ACHIH, (SKIN)
2-ethyl-4-methylimidazole 931-36-2 No data available
4-Methylimidazole 822-36-6 No data available
9. PHYSICAL AND CHEMICAL PROPERTIES
PHYSICAL FORM: ………………………………………………………………….. Liquid.
COLOR: ………………………………………………………………………………… Slight amber
ODOR: …………………………………………………………………………………… Ammonia-like
ODOR THRESHOLD: ………………………………………………………………. No data available
pH …………………………………………………………………………………………. 11.80
MELTING POINT / FREEZING POINT ………………………………………… No data available
BOILING POINT (760mm/Hg): ………………………………………………….. > 400 F (204 C) estimated based on similar product.
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FLASH POINT: ……………………………………………………………………….. Estimated > 200
F (93 C) estimated based similar product.
AUTO IGNITION TEMPERATURE ……………………………………………… No data available
LOWER EXPLOSIVE LIMIT (LEL) ……………………………………………… No data available
UPPER EXPLOSIVE LIMIT (UEL) ……………………………………………… No data available
VAPOR PRESSURE ………………………………………………………………… < 1 mmHg @ 20 C (estimated based on ingredient data).
SPECIFIC GRAVITY/DENSITY (water = 1)......................................... 0.98
BULK DENSITY.................................................................................. 8.14 lbs./gal. (0.98 kg/L)
VAPOR DENSITY (air = 1) ................................................................. No data available
EVAPORATIOIN RATE (Butyl Acetate = 1) ....................................... No data available
WATER SOLUBILITY (% BY WT.) ..................................................... No data available
PARTITION COEFFICIENT, n-OCTANOL/WATER (log Pow) ............ No data available
KINEMATIC VISCOSITY: ................................................................... 183 mm
2
/s @ 22
C
DECOMPOSITION TEMPERATURE : ................................................. No data available.
% VOLATILE BY WEIGHT: ................................................................ ASTM 2369-07 was used to determine the Volatile Matter Content of mixed
epoxy resin and hardener. The combined VOC content for the resin and hardener system is listed below.
VOC Content
Resin/Hardener (g/L) (lb/gal)
No data available ........................................................................ 1.84 0.02
10. STABILITY AND REACTIVITY
STABILITY: ........................................................................................ Product is stable at normal temperatures and pressures.
REACTIVITY / HAZARDOUS REACTIONS: ....................................... Product will not react by itself. A mass of more than one pound of product
plus an epoxy resin will cause irreversible polymerization with significant heat buildup and pressure.
INCOMPATIBILITIES: ........................................................................ Avoid organic and mineral acids, oxidizing materials, halogenated organic
compounds (e.g., methylene chloride), nitrosating agents, sodium hyprochlorite. External heating or self-heating could result in rapid temperature
increase and pressure build up. If such a condition were to occur in a drum, the drum could expand and rupture violently.
CONDITIONS TO AVOID: .................................................................. Avoid heat.
DECOMPOSITION PRODUCTS: ........................................................ Very toxic fumes and gases when burned or otherwise heated to
decomposition. Decomposition products may include, but not limited to: oxides of nitrogen, volatile amines, ammonia.
11. TOXICOLOGICAL INFORMATION
Ingredient Name CAS# LD50 Oral LD50 Dermal LC50 Inhalation
Methylenebiscyclohexanamine, 4,4 - 1761-71-3 380 mg/kg >1000 No data
Isophoronediamine 2855-13-2 1030 mg/kg >2000 >5.01 mg/l 4h mist
Polymer of epichlorohydrin / bisphenol A and
diethylenetriamine
31326-29-1
Refer to
Diethylenetriamine
data; ATPE (500
mg/kg)
Refer to
Diethylenetriamine
data; ATPE (1100
mg/kg)
No data available.
Refer to
Diethylenetriamine
data.
Trimethylolpropane polyoxypropylenetriamine 39423-51-3 550 mg/kg >1000 mg/kg No data available
Diethylenetriamine 111-40-0 1620 mg/kg 1090 mg/kg
1
0.07 0.3 mg/L 4hr
aerosol/mist
2-ethyl-4-methylimidazole 931-36-2 731-1000 mg/kg >400 mg/kg No data
4-Methylimidazole 822-36-6 350-751 mg/kg 440 mg/kg No data
1.
NOEL data has been generated for this substance by subjecting rats to an airborne aerosol/mist atmosphere in a test chamber. It has
not been determined that this data directly correlates to an inherent hazard of this product as would be expected under normal,
foreseeable or anticipated conditions of use.
ACUTE TOXICITY: ………………………………………………………………….. No specific toxicity data exists for this mixture. Classification is
based on acute toxicity estimation methods using ingredient data.
Oral: ……………………………………………………………………….. Category 4. Harmful if swallowed . May cause gastrointestinal
irritation or ulceration. May cause burns of the mouth and throat.
Dermal: …………………………………………………………………… Category 4. Harmful in contact with skin.
Inhalation:………………………………………………………………… Category 4. Harmful if inhaled. Can cause respiratory irritation,
shortness of breath or cough. May give off gas, vapor or aerosol that is very irritating or corrosive to the respiratory system. Exposure to
decomposition products can cause serious health hazard. Serious effects may be delayed following exposure.
SKIN CORROSION / IRRITATION: …………………………………………….. Category 1B. Causes severe skin burns. Effects may be
immediate. May cause persistent irritation or dermatitis.
SERIOUS EYE DAMAGE / IRRITATION:…………………………………….. Category 1. Causes serious eye damage. May cause blurred
vision. May cause corneal damage resulting in vision impairment or even blindness.
RESPIRATORY SENSITIZATION: ……………………………………………… Not classified. Based on available data does not meet
classification criteria.
PRO-SET
HTP-286 Hardener
Page 5 of 7 Last Revised: 01FEB24
SKIN SENSITIZATION:…………………………………………………………….. Category 1. May cause allergic skin reaction..
REPRODUCTIVE TOXICITY: …………………………………………………….. Not classified. Based on available data does not meet classification criteria.
MUTAGENICITY: …………………………………………………………………….. Not classified. Based on available data does not meet classification criteria.
CARCINOGENICITY: ……………………………………………………………….. Category 2. Suspected of causing cancer.
A component in this product, 4-Methyleimidazole, present at less than 0.5%, is suspected of causing cancer and is listed by IARC as a Group 2B
carcinogen. Under the conditions of 2-year NTP feed studies, there was no evidence of carcinogenic activity of 4-Methylimidazole in male rats
exposed to 625, 1,250 and 2,500 ppm. There was equivocal evidence of carcinogenic activity of 4-Methylimidazole in female rats based on
increased incidences of mononuclear cell leukemia. There was clear evidence of carcinogenic activity of 4-Methylimidazole in male and female
mice based on increased incidences of alveolar/bronchiolar neoplasms.
SPECIFIC TARGET ORGAN TOXICITY (Single Exposure): ………….. Not classified. Based on available data does not meet classification criteria.
SPECIFIC TARGET ORGAN TOXICITY (Repeated Exposure) : …….. STOT RE Category 2. May cause damage to organs through prolonged or
repeated exposure if swallowed. Repeated ingestion can result in damage to the following organs/biological systems: liver, muscles, skeletal.
ASPIRATION HAZARD : …………………………………………………………… Not classified. Based on available data does not meet classification criteria.
OTHER HEALTH HAZARD INFORMATION : ……………………………….. This product contains a component (diethylenetriamine) that is highly toxic
by inhalation when aerosolized due to spraying or when a mist is formed due to heating. It is advised that exposure not occur to product that is
sprayed or heated. While this product does not meet the classification for a respiratory sensitizer, components of this product can cause
aggravation of existing respiratory conditions, such as asthma.
12. ECOLOGICAL INFORMATION
ACUTE AQUATIC TOXICITY :……………………………………………………. No specific test data available for the mixture. Calculated
Estimate: Aquatic Acute Category 2. Toxic to aquatic life. Avoid release to the environment.
CHRONIC AQUATIC TOXICITY : ……………………………………………….. No specific test data available for the mixture. Calculated
Estimate: Aquatic Chronic Category 2. Toxic to aquatic life with long lasting effects. Avoid release to the environment.
PERSISTANCE AND BIODEGRADABILITY : ………………………………. No specific test data available for the mixture.
MOBILITY IN SOIL: …………………………………………………………………. No specific test data available for the mixture.
ADDITIONAL ECOTOXICITY INFORMATION : …………………………….. In the uncured, liquid state this product may be harmful to
aquatic life with long lasting effects. Prevent release to the environment, sewers and natural waters.
Ingredient CAS# Ecotoxicity Classification Information
Methylenebiscyclohexanamine, 4,4 – 1761-71-3 Acute Aquatic Cat. 2; Chronic Aquatic Cat. 2
Isophoronediamine 2855-13-2 Acute Aquatic Cat. 3; Chronic Aquatic Cat. 3
Polymer of epichlorohydrin / bisphenol A and
diethylenetriamine
31326-29-1
Not classified
Trimethylolpropane polyoxypropylenetriamine 39423-51-3 Acute Aquatic Cat. 2; Chronic Aquatic Cat. 2
Diethylenetriamine 111-40-0 Not classified
2-ethyl-4-methylimidazole 931-36-2 Acute Aquatic Cat. 3; Chronic Aquatic Cat. 3
4-Methylimidazole 822-36-6 Not classified
13. DISPOSAL CONSIDERATIONS
WASTE DISPOSAL METHOD: ………………………………………………….. Evaluation of this product using RCRA criteria shows that it is not a
hazardous waste, either by listing or characteristics, in its purchased form. It is the responsibility of the user to determine proper disposal
methods.
Incinerate, recycle (fuel blending) or reclaim may be preferred methods when conducted in accordance with federal, state and local regulations.
14. TRANSPORTATION INFORMATION
US DOT
UN NUMBER: …………………………………………………………………………. UN 2735
SHIPPING NAME: ……………………………………………………………………. Polyamines, liquid, corrosive, n.o.s.
TECHNICAL SHIPPING NAME: …………………………………………………. Methylenebiscyclohexanamine, 4,4 –
HAZARD CLASS: …………………………………………………………………….. Class 8
PACKING GROUP: ………………………………………………………………….. PG II
MARINE POLLUTANT: …………………………………………………………….. No
CANADA TDG
UN NUMBER: …………………………………………………………………………. UN 2735
PRO-SET
HTP-286 Hardener
Page 6 of 7 Last Revised: 01FEB24
SHIPPING NAME: ……………………………………………………………………. Polyamines, liquid, corrosive, n.o.s.
TECHNICAL SHIPPING NAME: …………………………………………………. Methylenebiscyclohexanamine, 4,4 –
HAZARD CLASS: …………………………………………………………………….. Class 8
PACKING GROUP: ………………………………………………………………….. PG II
MARINE POLLUTANT: …………………………………………………………….. No
IMDG
UN NUMBER: …………………………………………………………………………. UN 2735
SHIPPING NAME: ……………………………………………………………………. Polyamines, liquid, corrosive, n.o.s.
TECHNICAL SHIPPING NAME: …………………………………………………. Methylenebiscyclohexanamine, 4,4 –
HAZARD CLASS: …………………………………………………………………….. Class 8
PACKING GROUP: ………………………………………………………………….. PG II
EmS Number: ………………………………………………………………………… F-A, S-B
MARINE POLLUTANT ……………………………………………………………… Yes
ICAO/IATA
UN NUMBER: …………………………………………………………………………. UN 2735
SHIPPING NAME: ……………………………………………………………………. Polyamines, liquid, corrosive, n.o.s.
TECHNICAL SHIPPING NAME: …………………………………………………. Methylenebiscyclohexanamine, 4,4 –
HAZARD CLASS: …………………………………………………………………….. Class 8
PACKING GROUP: ………………………………………………………………….. PG II
MARINE POLLUTANT: …………………………………………………………….. Yes
15. REGULATORY INFORMATION
COUNTRY INVENTORY LIST STATUS
United States TSCA All ingredients are listed or otherwise compliant.
Europe EINECS or ELINCS All ingredients are listed or otherwise compliant.
Canada CEPA (DSL/NDSL) CAS# 822-36-6 is on NDSL only. All other ingredients are DSL listed.
Australia AICS All ingredients are listed or otherwise compliant.
Japan ENCS All ingredients are listed or otherwise compliant.
South Korea KECI All ingredients are listed or otherwise compliant.
China IECSC All ingredients are listed or otherwise compliant.
Philippines PICCS All ingredients are listed or otherwise compliant.
US EPA TSCA Specific Requirements: …………………………………….. No data available.
Canada WHMIS Confidential Business Information (CBI): ………….. No data available.
US EPA SARA TITLE III Reporting and Notification Requirements:
Subject to Section 302 (TPQ) ……………………………………………… No data available.
Subject to Section 304 (RQ) ……………………………………………….. No data available.
Subject to Section 311 or 312 …………………………………………….. Refer to the health and physical classifications in Section 2.
Subject to Section 313 ………………………………………………………. No data available.
US STATE REGULATORY INFORMATION:
The following chemicals may be specifically regulated by individual states. For details on state regulatory requirements you should contact the
appropriate state agency.
COMPONENT NAME
/CAS NUMBER STATE CODE
4-Methylimidazole
822-36-6
1
CA, PA, NJ
Diethylenetriamine
111-40-0 PA
1.
These substances are known to the state of California to cause cancer or reproductive harm, or both.
16. OTHER INFORMATION
REASON FOR ISSUE:……………………………………………………………… Approval date change.
SDS CONTACT: ……………………………………………………………………… safety@gougeon.com
TITLE: …………………………………………………………………………………… Health, Safety & Environmental Manager
APPROVAL DATE: …………………………………………………………………. 01FEB24
SUPERSEDES DATE: ……………………………………………………………… January 15, 2019
SDS VERSION: ………………………………………………………………………. HTP-286-2024a
OTHER HAZARD INFORMATION AND RATING SYSTEMS:
HMIS RATING NFPA 704 CODES
PRO-SET
HTP-286 Hardener
Page 7 of 7 Last Revised: 01FEB24
HEALTH: 3
FLAMMABILITY: 1
PHYSICAL HAZARD: 0
PERSONAL PROTECTION:
Approximate HMIS and NFPA Risk Ratings Legend:
0 = Low or None; 1 = Slight; 2 = Moderate; 3 = Serious; 4 = Severe
Information in this document is furnished without warranty, expressed or implied, except that it is accurate to the best knowledge of Gougeon Brothers,
Inc. The data on this sheet is related only to the specific material designated herein. Gougeon Brothers, Inc. assumes no legal responsibility for use or
reliance upon these data.
3 0
1
2
by | Sep 27, 2025
PRO-SET HTP-284 Hardener
Safety Data Sheet
According to the Hazard Communication Standard (CFR29 1910.1200) HazCom 2012 and the Hazardous Products
Regulations (HPR) WHMIS 2015
Date of issue: 03/19/2018 Revision date: 05/15/2018 Version: HTP-284-2018b
03/19/2018 EN (English) Page 1
SECTION 1: Identification
Identification
Product form : Mixture
Product name : PRO-SET HTP-284 Hardener
Product code : HTP-284, HTP-284-1, HTP-284-2, HTP-284-3, HTP-284-4, HTP-284-5
Relevant identified uses of the substance or mixture and uses advised against
Recommended use : Curing agent for epoxy resins
Details of the supplier of the safety data sheet
Supplier
Gougeon Brothers, Inc
100 Patterson Ave.
Bay City, MI 48706 – U.S.A.
T 888-377-6738 or 989-684-7286
www.prosetepoxy.com
Emergency telephone number
Emergency number : CHEMTREC 1 (800) 424-9300
CHEMTREC International +1 (703) 527-3887 24 hr
SECTION 2: Hazard(s) identification
Classification of the substance or mixture
Acute Tox. 4 (Oral)
Acute Tox. 4 (Dermal)
Skin Corr. 1B
Eye Dam. 1
Skin Sens. 1
Carc. 2
STOT SE 3
STOT RE 2
Aquatic Acute 2
Aquatic Chronic 2
Label elements
Hazard pictograms (GHS) :
GHS05
GHS07
GHS08
GHS09
Signal word (GHS)
:
Danger
Hazard statements (GHS)
:
Harmful if swallowed or in contact with skin. Causes severe skin burns and eye damage. May cause an allergic skin reaction. Suspected of causing
cancer. May cause respiratory irritation. May cause damage to organs through prolonged or repeated exposure (oral). Toxic to aquatic life with long
lasting effects.
Precautionary statements (GHS)
:
Obtain special instructions before use. Do not handle until all safety precautions have been read and understood. Do not breathe
dust/fume/gas/mist/vapours/spray. Wash hands, forearms and face thoroughly after handling. Do not eat, drink or smoke when using this product.
Use only outdoors or in a well-ventilated area. Contaminated work clothing must not be allowed out of the workplace. Avoid release to the
environment. Wear protective gloves/protective clothing/eye protection/face protection. If exposed or concerned: Get medical advice/attention. If
swallowed: rinse mouth. Do NOT induce vomiting. If on skin (or hair): Take off immediately all contaminated clothing. Rinse skin with water/shower.
Wash contaminated clothing before reuse. If skin irritation or rash occurs: Get medical advice/attention. If inhaled: Remove person to fresh air and
keep comfortable for breathing. Call a poison center/doctor if you feel unwell. IF IN EYES: Rinse cautiously with water for several minutes. Remove
contact lenses, if present and easy to do. Continue rinsing. Immediately call a poison center/doctor. Collect spillage. Store in a well-ventilated place.
Keep container tightly closed. Store locked up. Dispose of contents/container to hazardous or special waste collection point, in accordance with
local, regional, national and/or international regulation
PRO-SET HTP-284 Hardener
Safety Data Sheet
According to the Hazard Communication Standard (CFR29 1910.1200) HazCom 2012 and the Hazardous Products Regulations (HPR) WHMIS 2015
03/19/2018 EN (English) 2/8
Other hazards
No additional information available
Unknown acute toxicity
Not applicable
SECTION 3: Composition/information on ingredients
Substances
Not applicable
Mixtures
Name Product identifier %
Diethylenetriamine-bisphenol A-epichlorohydrin polymer
(CAS-No.) 31326-29-1 15 – 40
1,3-Cyclohexanedimethanamine
(CAS-No.) 2579-20-6 10 – 30
Cyclohexanamine, 4,4′-methylenebis-
(CAS-No.) 1761-71-3 10 – 30
Diethylenetriamine
(CAS-No.) 111-40-0 7 – 13
1H-Imidazole, 2-ethyl-4-methyl-
(CAS-No.) 931-36-2 1 – 5
4-Methylimidazole
(CAS-No.) 822-36-6 0.1 – 1.5
The exact chemical identity and/or exact percentage (concentration) of each ingredient may be held as confidential business information (CBI). Any
ingredient not disclosed in this section may have been determined not to be hazardous to health or the environment, or it may be present at a level
below its disclosure threshold. Refer to Section 15 for additional information regarding this CBI claim.
SECTION 4: First aid measures
Description of first aid measures
First-aid measures after inhalation : If inhaled: Remove person to fresh air and keep comfortable for breathing. Immediately call a
POISON CENTER/doctor.
First-aid measures after skin contact : If on skin (or hair): Take off immediately all contaminated clothing. Rinse skin with
water/shower. Wash contaminated clothing before reuse. Immediately call a POISON
CENTER/doctor.
First-aid measures after eye contact : IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present
and easy to do. Continue rinsing. Immediately call a POISON CENTER/doctor.
First-aid measures after ingestion : IF SWALLOWED: rinse mouth. Do NOT induce vomiting. Never give anything by mouth to an
unconscious person. Immediately call a POISON CENTER/doctor.
Most important symptoms and effects, both acute and delayed
Symptoms/effects after inhalation : May cause respiratory irritation. May cause burns.
Symptoms/effects after skin contact : Causes severe skin burns. Harmful in contact with skin. Symptoms may include redness, pain,
blisters. May cause an allergic skin reaction.
Symptoms/effects after eye contact : Causes serious eye damage. Symptoms may include discomfort or pain, excess blinking and
tear production, with marked redness and swelling of the conjunctiva. May cause burns.
Symptoms/effects after ingestion : Harmful if swallowed. May cause gastrointestinal irritation, nausea, vomiting and diarrhea. May
cause burns or irritation of the linings of the mouth, throat, and gastrointestinal tract.
Indication of any immediate medical attention and special treatment needed
Symptoms may be delayed. In case of accident or if you feel unwell, seek medical advice immediately (show the label where possible).
SECTION 5: Firefighting measures
Extinguishing media
Suitable extinguishing media : Foam. Carbon dioxide. Dry chemical.
Unsuitable extinguishing media : Do not use a heavy water stream.
Special hazards arising from the substance or mixture
Fire hazard : Products of combustion may include, and are not limited to: oxides of carbon. Oxides of
nitrogen. Amines. Ammonia. Nitric acid. Nitrosamines. Irritating fumes. When mixed with
sawdust, wood chips, or other cellulosic material, spontaneous combustion can occur under
certain conditions. Heat is generated as the air oxidizes the amine. If the heat is not dissipated
quickly enough, it can ignite the sawdust.
Reactivity : No dangerous reactions known under normal conditions of use.
Advice for firefighters
Protection during firefighting : Keep upwind of fire. Wear full fire fighting turn-out gear (full Bunker gear) and respiratory
protection (SCBA).
PRO-SET HTP-284 Hardener
Safety Data Sheet
According to the Hazard Communication Standard (CFR29 1910.1200) HazCom 2012 and the Hazardous Products Regulations (HPR) WHMIS 2015
03/19/2018 EN (English) 3/8
SECTION 6: Accidental release measures
Personal precautions, protective equipment and emergency procedures
General measures : Use personal protection recommended in Section 8. Isolate the hazard area and deny entry to
unnecessary and unprotected personnel.
For non-emergency personnel
No additional information available
For emergency responders
No additional information available
Environmental precautions
Prevent entry to sewers and public waters. Notify authorities if product enters sewers or public waters.
Methods and material for containment and cleaning up
For containment : Absorb and/or contain spill with inert material (sand, vermiculite or other appropriate material),
then place in suitable container. Do not flush into surface water or sewer system. Wear
recommended personal protective equipment. Do not use sawdust or other combustible
material to absorb spilled material.
Methods for cleaning up : Sweep or shovel spills into appropriate container for disposal. Provide ventilation.
Reference to other sections
For further information refer to section 8: “Exposure controls/personal protection”.
SECTION 7: Handling and storage
Precautions for safe handling
Precautions for safe handling : DO NOT spray apply or heat this product. Obtain special instructions before use. Do not handle
until all safety precautions have been read and understood. Do not get in eyes, on skin, or on
clothing. Do not breathe dust/fume/gas/mist/vapours/spray. Do not swallow. Handle and open
container with care. Do not eat, drink or smoke when using this product. Ensure adequate
ventilation. When mixed with epoxy resin this product causes an exothermic reaction, which in
large masses, can produce enough heat to damage or ignite surrounding materials and emit
fumes and vapors that vary widely in composition and toxicity.
Hygiene measures : Wash contaminated clothing before reuse. Always wash hands after handling the product.
Conditions for safe storage, including any incompatibilities
Storage conditions : Keep out of the reach of children. Keep container tightly closed. Store in dry, cool, well-
ventilated area. Store locked up.
Storage temperature : 40 – 90 F / 4 – 32 C
SECTION 8: Exposure controls/personal protection
Control parameters
Diethylenetriamine-bisphenol A-epichlorohydrin polymer (31326-29-1)
ACGIH ACGIH TWA (mg/m ) Refer to Diethylenetriamine
1,3-Cyclohexanedimethanamine (2579-20-6)
Not applicable
Cyclohexanamine, 4,4′-methylenebis- (1761-71-3)
Not applicable
Diethylenetriamine (111-40-0)
ACGIH ACGIH TWA (ppm) 1 ppm (skin)
1H-Imidazole, 2-ethyl-4-methyl- (931-36-2)
Not applicable
4-Methylimidazole (822-36-6)
Not applicable
Exposure controls
Appropriate engineering controls : Ensure good ventilation of the work station.
Hand protection : Wear suitable gloves resistant to chemical penetration.
PRO-SET HTP-284 Hardener
Safety Data Sheet
According to the Hazard Communication Standard (CFR29 1910.1200) HazCom 2012 and the Hazardous Products Regulations (HPR) WHMIS 2015
03/19/2018 EN (English) 4/8
Eye protection : Wear eye/face protection.
Skin and body protection : Wear suitable protective clothing.
Respiratory protection : In case of insufficient ventilation, wear suitable respiratory equipment. Respirator selection
must be based on known or anticipated exposure levels, the hazards of the product and the
safe working limits of the selected respirator.
Environmental exposure controls : Avoid release to the environment.
Other information : Handle in accordance with good industrial hygiene and safety procedures. Do not eat, drink or
smoke when using this product.
SECTION 9: Physical and chemical properties
Information on basic physical and chemical properties
Physical state : Liquid
Appearance : No data available
Colour : Slight Amber
Odour : ammonia
Odour threshold : No data available
pH : 11.86
Melting point : No data available
Freezing point : No data available
Boiling point : > 400 F / 204 C [Estimated based similar product]
Flash point : > 200 F / 93 C [Estimated based similar product]
Relative evaporation rate (butylacetate=1) : No data available
Flammability (solid, gas) : No data available
Vapour pressure : < 1 mm Hg @ 20 C [Estimated based on ingredient data]
Relative vapour density at 20 C : No data available
Relative density : 1.003
Solubility : No data available
Partition coefficient n-octanol/water : No data available
Auto-ignition temperature : No data available
Decomposition temperature : No data available
Viscosity, kinematic : 239.3 mm /s @ 20 C
Viscosity, dynamic : No data available
Explosive limits : No data available
Explosive properties : No data available
Oxidising properties : No data available
Other information
VOC content : 2.06 g/l [Mixed epoxy resin and hardener - HTP-182 / HTP-284 (ASTM 2369-07)]
Bulk density : 8.37 lb/gal / 1.003 kg/L
SECTION 10: Stability and reactivity
Reactivity : No dangerous reactions known under normal conditions of use.
Chemical stability : Stable under normal conditions.
Possibility of hazardous reactions : No dangerous reactions known under normal conditions of use. A mass of more than one
pound of product plus an epoxy resin will cause irreversible polymerization with significant heat
buildup and pressure.
Conditions to avoid : Heat. Incompatible materials.
Incompatible materials : Acids. Oxidizing materials. Halogenated compounds. Nitrosating agents. Sodium hypochlorite.
Hazardous decomposition products : May include, and are not limited to: oxides of carbon. Oxides of nitrogen. Amines. Ammonia.
Nitric acid. Nitrosamines.
SECTION 11: Toxicological information
Information on toxicological effects
Diethylenetriamine-bisphenol A-epichlorohydrin polymer (31326-29-1)
LD50 oral rat Refer to Diethylenetriamine data; ATPE (500 mg/kg)
PRO-SET HTP-284 Hardener
Safety Data Sheet
According to the Hazard Communication Standard (CFR29 1910.1200) HazCom 2012 and the Hazardous Products Regulations (HPR) WHMIS 2015
03/19/2018 EN (English) 5/8
Diethylenetriamine-bisphenol A-epichlorohydrin polymer (31326-29-1)
LD50 dermal rabbit Refer to Diethylenetriamine data; ATPE (1100 mg/kg)
LC50 inhalation rat No data available. Refer to Diethylenetriamine data.
1,3-Cyclohexanedimethanamine (2579-20-6)
LD50 oral rat 700 - 780 mg/kg
LD50 dermal rabbit 1700 mg/kg
Cyclohexanamine, 4,4'-methylenebis- (1761-71-3)
LD50 oral rat 380 mg/kg
LD50 dermal rabbit > 1000 mg/kg
Diethylenetriamine (111-40-0)
LD50 oral rat 1620 mg/kg
LD50 dermal rabbit 1090 mg/kg
LC50 inhalation rat 0.07 – 0.3 mg/l/4h aerosol/mist
1H-Imidazole, 2-ethyl-4-methyl- (931-36-2)
LD50 oral rat 731 – 1000 mg/kg
LD50 dermal rabbit > 400 mg/kg
4-Methylimidazole (822-36-6)
LD50 oral rat 350 – 751 mg/kg
LD50 dermal rabbit 440 mg/kg
Acute toxicity (oral) : Harmful if swallowed.
Acute toxicity (dermal) : Harmful in contact with skin.
Acute toxicity (inhalation) : Not classified.
Skin corrosion/irritation : Causes severe skin burns.
pH: 11.86
Serious eye damage/irritation : Causes serious eye damage.
pH: 11.86
Respiratory or skin sensitization : May cause an allergic skin reaction.
Germ cell mutagenicity : Not classified.
Carcinogenicity : Suspected of causing cancer.
4-Methylimidazole (822-36-6)
IARC group 2B – Possibly carcinogenic to humans
In OSHA Hazard Communication Carcinogen list Yes
Reproductive toxicity : Not classified.
STOT-single exposure : May cause respiratory irritation.
STOT-repeated exposure : May cause damage to organs through prolonged or repeated exposure (oral).
Aspiration hazard : Not classified.
PRO-SET HTP-284 Hardener
Viscosity, kinematic (calculated value) 239.3 mm /s @ 20 C
Symptoms/effects after inhalation : May cause respiratory irritation. May cause burns.
Symptoms/effects after skin contact : Causes severe skin burns. Harmful in contact with skin. Symptoms may include redness, pain,
blisters. May cause an allergic skin reaction.
Symptoms/effects after eye contact : Causes serious eye damage. Symptoms may include discomfort or pain, excess blinking and
tear production, with marked redness and swelling of the conjunctiva. May cause burns.
Symptoms/effects after ingestion : Harmful if swallowed. May cause gastrointestinal irritation, nausea, vomiting and diarrhea. May
cause burns or irritation of the linings of the mouth, throat, and gastrointestinal tract.
Other information : Likely routes of exposure: ingestion, inhalation, skin and eye.
SECTION 12: Ecological information
Toxicity
Ecology – general : Toxic to aquatic life with long lasting effects.
PRO-SET HTP-284 Hardener
Safety Data Sheet
According to the Hazard Communication Standard (CFR29 1910.1200) HazCom 2012 and the Hazardous Products Regulations (HPR) WHMIS 2015
03/19/2018 EN (English) 6/8
Diethylenetriamine (111-40-0)
LC50 fish 1 248 mg/l (Exposure time: 96 h – Species: Poecilia reticulata [static])
EC50 Daphnia 1 16 mg/l (Exposure time: 48 h – Species: Daphnia magna)
LC50 fish 2 1014 mg/l (Exposure time: 96 h – Species: Poecilia reticulata [semi-static])
4-Methylimidazole (822-36-6)
EC50 Daphnia 1 180 mg/l (Exposure time: 48 h – Species: Daphnia magna)
Ingredient CAS# Ecotoxicity Classification Information
Diethylenetriamine-bisphenol A-epichlorohydrin polymer
31326-29-1 Not classified
1,3-Cyclohexanedimethanamine
2579-20-6 Acute Aquatic Cat. 3; Chronic Aquatic Cat. 3
Cyclohexanamine, 4,4′-methylenebis-
1761-71-3 Acute Aquatic Cat. 2; Chronic Aquatic Cat. 2
Diethylenetriamine
111-40-0 Not classified
1H-Imidazole, 2-ethyl-4-methyl-
931-36-2 Acute Aquatic Cat. 3; Chronic Aquatic Cat. 3
4-Methylimidazole
822-36-6 Not classified
Persistence and degradability
PRO-SET HTP-284 Hardener
Persistence and degradability Not established.
Bioaccumulative potential
PRO-SET HTP-284 Hardener
Bioaccumulative potential Not established.
Cyclohexanamine, 4,4′-methylenebis- (1761-71-3)
Partition coefficient n-octanol/water 2.03
Diethylenetriamine (111-40-0)
BCF fish 1 0.3 – 1.7
Partition coefficient n-octanol/water -1.3
4-Methylimidazole (822-36-6)
Partition coefficient n-octanol/water 0.35 (at 25 C)
Mobility in soil
PRO-SET HTP-284 Hardener
Ecology – soil No additional information available.
Other adverse effects
Other information : No other effects known.
SECTION 13: Disposal considerations
Waste treatment methods
Product/Packaging disposal
recommendations
: Dispose in a safe manner in accordance with local/national regulations.
SECTION 14: Transport information
Department of Transportation (DOT) and Transportation of Dangerous Goods (TDG)
In accordance with DOT/TDG
UN-No.(DOT/TDG) : UN2735
Proper Shipping Name (DOT/TDG) : Polyamines, liquid, corrosive, n.o.s.
Proper Shipping Name – Addition : 1,3-cyclohexanedimethanamine
Class (DOT/TDG) : 8 – Class 8 – Corrosive material 49 CFR 173.136
Packing group (DOT/TDG) : II
Transport by sea
In accordance with IMDG
UN-No. (IMDG) : 2735
PRO-SET HTP-284 Hardener
Safety Data Sheet
According to the Hazard Communication Standard (CFR29 1910.1200) HazCom 2012 and the Hazardous Products Regulations (HPR) WHMIS 2015
03/19/2018 EN (English) 7/8
Proper Shipping Name (IMDG) : POLYAMINES, LIQUID, CORROSIVE, N.O.S .
Proper Shipping Name – Addition : 1,3-cyclohexanedimethanamine
Class (IMDG) : 8 – Corrosive substances
Packing group (IMDG) : II
EmS-No. : F-A, S-B
Marine pollutant : Yes
Transport by air
In accordance with IATA
UN-No. (IATA) : 2735
Proper Shipping Name (IATA) : Polyamines, liquid, corrosive, n.o.s.
Proper Shipping Name – Addition : 1,3-cyclohexanedimethanamine
Class (IATA) : 8 – Corrosives
Packing group (IATA) : II
Marine pollutant : Yes
SECTION 15: Regulatory information
Federal regulations
All components of this product are listed, or excluded from listing, on the United States Environmental Protection Agency Toxic Substances
Control Act (TSCA) inventory.
All components of this product are listed, or excluded from listing, on the Canadian DSL (Domestic Substances List) and NDSL (Non-Domestic
Substances List) inventories.
Diethylenetriamine-bisphenol A-epichlorohydrin polymer (31326-29-1)
EPA TSCA Regulatory Flag XU – XU – indicates a substance exempt from reporting under Chemical Data Reporting Rule
(formerly the Inventory Update Reporting Rule), i.e, Partial Updating of the TSCA Inventory
Data Base Production and Site Reports (40 CFR 711).
Canada WHMIS Confidential Business Information (CBI): No data available
International regulations
No additional information available
US State regulations
WARNING
This product can expose you to 4-Methylimidazole, which is known to the State of California to cause cancer. For more
information go to www.P65Warnings.ca.gov.
4-Methylimidazole (822-36-6)
U.S. – California –
Proposition 65 –
Carcinogens List
U.S. – California –
Proposition 65 –
Developmental Toxicity
U.S. – California –
Proposition 65 –
Reproductive Toxicity –
Female
U.S. – California –
Proposition 65 –
Reproductive Toxicity –
Male
No significant risk
level (NSRL)
Yes No No No 29 g/day
Diethylenetriamine (111-40-0)
U.S. – New Jersey – Right to Know Hazardous Substance List
U.S. – Pennsylvania – RTK (Right to Know) List
SECTION 16: Other information
Date of issue : 03/19/2018
Revision date : 05/15/2018
Other information : None.
PRO-SET HTP-284 Hardener
Safety Data Sheet
According to the Hazard Communication Standard (CFR29 1910.1200) HazCom 2012 and the Hazardous Products Regulations (HPR) WHMIS 2015
03/19/2018 EN (English) 8/8
NFPA health hazard : 3
NFPA fire hazard : 1
NFPA reactivity : 0
Hazard Rating
Health : 3 Serious Hazard
Flammability : 1 Slight Hazard
Physical : 0 Minimal Hazard
Disclaimer: We believe the statements, technical information and recommendations contained herein are reliable, but they are given without warranty or guarantee of any kind. The information contained
in this document applies to this specific material as supplied. It may not be valid for this material if it is used in combination with any other materials. It is the user s responsibility to satisfy oneself as to the
suitability and completeness of this information for the user s own particular use.
by | Sep 27, 2025
SAFETY DATA SHEET
Last Revised: 03JAN22
1. CHEMICAL PRODUCT AND COMPANY IDENTIFICATION
PRODUCT NAME: ……………………………………… PRO-SET
HTP-284 Hardener
APPLICABLE PRODUCT CODES: ………………. HTP-284, HTP-284-1, HTP-284-2, HTP-284-3, HTP-284-QC-3, HTP-284-4, HTP-284-QC-4
CHEMICAL FAMILY: ………………………………….. Polyamine-imidazole mixture.
INTENDED PRODUCT USES: ……………………… Curing agent for epoxy resins.
PRODUCT RESTRICTIONS: ……………………….. None identified.
SDS VERSION: …………………………………………. HTP-284-2022a
MANUFACTURER: EMERGENCY TELEPHONE NUMBERS (24 HRS):
Gougeon Brothers, Inc. Transportation
100 Patterson Ave. CHEMTREC: ……………….. 800-424-9300 (U.S.)
Bay City, MI 48706, U.S.A. 703-527-3887 (International)
Phone: 888-377-6738 or 989-684-7286 Non-transportation
www.prosetepoxy.com Poison Hotline: …………….. 800-222-1222
2. HAZARDS IDENTIFICATION
Classification of Substance or Mixture
Acute toxicity, Oral, Category 4
Acute toxicity, Dermal, Category 4
Skin corrosion/irritation, Category 1B
Skin sensitizer, Category 1
Eye damage/irritation, Category 1
Carcinogenicity, Category 2
Specific target organ toxicity (repeated exposure – oral), Category 2
Specific target organ toxicity (single exposure), Category 3
Acute aquatic toxicity, Category 2
Chronic aquatic toxicity, Category 2
Label Elements
Hazard Pictogram(s):
Signal Word:
DANGER
Hazard Statements:
H302 Harmful if swallowed
H312 Harmful in contact with skin
H314 Causes severe skin burns and eye damage
H317 May cause an allergic skin reaction
H335 May cause respiratory irritation
H351 Suspected of causing cancer
H372 May cause damage to organs through prolonged or repeated exposure if swallowed
H411 Toxic to aquatic life with long lasting effects
Precautionary Statements:
Prevention
P201 Obtain special instructions before use
P202 Do not handle until all safety precautions have been read and understood
P260 Do not breathe dust/fume/gas/mist/vapors/spray
P264 Wash hands thoroughly after handling
P270 Do not eat, drink or smoke when using this product
P271 Use only outdoors or in a well-ventilated area
P272 Contaminated work clothing should not be allowed out of the workplace
P273 Avoid release to the environment
P280 Wear protective gloves/protective clothing/eye protection/face protection
Response
P301 + P330 + 331 IF SWALLOWED: Rinse mouth. Do NOT induce vomiting.
P303 + P361 + P353 IF ON SKIN (or hair): Take off immediately all contaminated clothing. Rinse or wash skin with soap and water (or
shower).
P304 + P340 IF INHALED: Remove person to fresh air and keep comfortable for breathing
PRO-SET
HTP-284 Hardener
Page 2 of 7 Last Revised: 03JAN22
P305 + P351 + P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do.
Continue rinsing.
P308 + P313 IF exposed or concerned: Get medical attention/advice
P310 Immediately call a POISON CENTER or doctor.
P314 Get medical advice/attention if you feel unwell.
P333 + P313 If skin irritation or rash occurs: Get medical attention/advice
P362 + P364 Take of contaminated clothing and wash it before reuse
P391 Collect spillage
Storage
P403 + P233 Store in a well-ventilated place. Keep container tightly closed.
P405 Store locked up.
Disposal
P501 Dispose of contents and container according to local, state, national and International regulations
Other Hazards
None known.
3. COMPOSITION/INFORMATION ON HAZARDOUS INGREDIENTS
INGREDIENT NAME CAS # CONCENTRATION (%)
Polymer of epichlorohydrin / bisphenol A and diethylenetriamine 31326-29-1 15-40
1,3-cyclohexanedimethanamine 2579-20-6 10-30
Methylenebiscyclohexanamine, 4,4 – 1761-71-3 10-30
Diethylenetriamine 111-40-0 7-13
2-ethyl-4-methylimidazole 931-36-2 1-5
4-Methylimidazole 822-36-6 0.1-1.5
The exact chemical identity and/or exact percentage (concentration) of each ingredient may be held as confidential business information
(CBI). Any ingredient not disclosed in this section may have been determined not to be hazardous to health or the environment, or it may
be present at a level below its disclosure threshold.
4. FIRST AID MEASURES
FIRST AID FOR EYES ……………………………………………………………… SYMPTOMS: Causes eye burns and eye damage. RESPONSE: Flush
immediately with water for at least 15 minutes. Remove contact lenses if present and easy to do. Immediately call a POISON CONTROL CENTER
or doctor.
FIRST AID FOR SKIN ………………………………………………………………. SYMPTOMS: Causes skin burns, redness and irritation. May cause allergic
skin reaction and sensitization. RESPONSE: Immediately wash skin with soap and water. Immediately call a POISON CONTROL CENTER or
doctor.
FIRST AID FOR INHALATION…………………………………………………… SYMPTOMS: Can cause respiratory irritation, shortness of breath or cough.
RESPONSE: Remove to fresh air if effects occur and keep comfortable for breathing. Immediately call POISON CONTROL CENTER or doctor.
FIRST AID FOR INGESTION …………………………………………………….. SYMPTOMS: May cause gastrointestinal irritation or ulceration. May
cause burns of the mouth and throat. RESPONSE: Rinse mouth with water. DO NOT induce vomiting. If vomiting should occur, keep airway
clear. Immediately call POISON CONTROL CENTER or doctor.
NOTES TO PHYSICIAN: Use of gastric lavage or emesis is contraindicated. Although product does not meet criteria for aspiration toxicity, vomitus
may cause lung injury. Possible perforation of stomach or esophagus should be investigated. Consider endotracheal/esophageal control if lavage
is done. Do not give chemical antidotes. Asphyxia from glottal edema may occur. Marked decrease in blood pressure may occur with moist rales,
frothy sputum, and high pulse pressure. Treat symptomatically.
5. FIRE FIGHTING MEASURES
EXTINGUISHING MEDIA: ………………………………………………………… SUITABLE: Foam, carbon dioxide (CO2), dry chemical. NON-SUITABLE:
Direct water stream.
FIRE AND EXPLOSION HAZARDS: ………………………………………….. During a fire, smoke may contain the original materials in addition to
combustion products of varying composition which may be toxic and/or irritating. Combustion products may include, but are not limited to: oxides
of nitrogen, carbon monoxide, carbon dioxide, volatile amines, ammonia, nitric acid, nitrosamines. When mixed with sawdust, wood chips, or
other cellulosic material, spontaneous combustion can occur under certain conditions. Heat is generated as the air oxidizes the amine. If the heat
is not dissipated quickly enough, it can ignite the sawdust.
SPECIAL FIRE FIGHTING PROCEDURES: ………………………………… Use full-body protective gear and a self-contained breathing apparatus.
Use of water may generate toxic aqueous solutions. Do not allow water run-off from fighting fire to enter drains or other water courses.
6. ACCIDENTAL RELEASE MEASURES
PRO-SET
HTP-284 Hardener
Page 3 of 7 Last Revised: 03JAN22
EMERGENCY PROCEDURES : …………………………………………………. Keep unnecessary and unprotected personnel from entering area. Use
appropriate safety and personal protective equipment as indicated in Section 8.
MITIGATION AND CLEAN UP PROCEDURES: …………………………… Stop leak without additional risk. Isolate area. Dike and absorb with inert
material (e.g., sand) and collect in a suitable, closed container. Do not use sawdust, wood chips or other cellulosic materials to absorb the spill, as
the possibility for spontaneous combustion exists. Warm, soapy water may be used to clean residual.
ENVIRONMENTAL PRECAUTIONS: ………………………………………….. Prevent from entering into soil, ditches, sewers, waterways and
groundwater. See Section 12 for environmental impact information.
7. HANDLING AND STORAGE
STORAGE TEMPERATURE (min./max.): …………………………………… 40 F (4 C) / 90 F (32 C).
STORAGE: …………………………………………………………………………….. Store in cool, dry place away from high temperatures and moisture. Keep
container tightly closed. Store in a secure location with restricted access or store locked up.
HANDLING PRECAUTIONS: ……………………………………………………. DO NOT spray apply or heat this product. Use only outdoors or with
adequate ventilation. If ventilation cannot be made adequate, refer to respiratory protection in Section 8. Do not breathe vapors or mists from
heated material. Do not breathe concentrated vapors. Avoid skin and eye contact. Wash thoroughly after handling. When mixed with epoxy
resin this product causes an exothermic reaction, which in large masses, can produce enough heat to damage or ignite surrounding materials and
emit fumes and vapors that vary widely in composition and toxicity. Do not breathe vapors or fumes from uncontrolled exotherming masses.
8. EXPOSURE CONTROLS/PERSONAL PROTECTION
ENGINEERING CONTROLS: ……………………………………………………. Use with adequate general ventilation and/or local ventilation to keep
exposures below established limits.
EYE PROTECTION GUIDELINES: …………………………………………….. Chemical splash-proof goggles or face shield.
SKIN PROTECTION GUIDELINES: ……………………………………………. Wear liquid-proof, chemical resistant gloves (nitrile-butyl rubber, neoprene,
butyl rubber or natural rubber) and full body-covering clothing. Use of an impervious material may be used for areas of the skin more likely to
come in contact.
RESPIRATORY PROTECTION GUIDELINES: …………………………….. When ventilation cannot be made adequate enough to keep exposures
below established limits, use a NIOSH approved respirator with an organic vapor cartridge, organic vapor cartridge + P100, or a multi-contaminant
cartridge, depending on specific workplace conditions. Consult with your respirator and cartridge supplier to ensure proper selection of respirator
and cartridge based on ingredients listed in Section 3 and specific workplace conditions. Use and select a respirator according the guidelines
established in OSHA 1910.134 or other applicable respiratory protection standard.
ADDITIONAL PROTECTIVE MEASURES: ………………………………….. Use where there is immediate access to safety shower and emergency eye
wash. Wash thoroughly after use. Contact lens should not be worn when working with this material. Generally speaking, working cleanly and
following basic precautionary measures will greatly minimize the potential for harmful exposure to this product under normal use conditions.
OCCUPATIONAL EXPOSURE LIMITS: ……………………………………… Exposure limits may not be established for this product as a whole. For
established exposure limits of specific ingredients in this product, or other available exposure limit information, refer to the table below.
Ingredient Name CAS# Exposure Limit Information
Polymer of epichlorohydrin / bisphenol A and
diethylenetriamine
31326-29-1
No data available
1,3-cyclohexanedimethanamine 2579-20-6 No data available
Methylenebiscyclohexanamine, 4,4 – 1761-71-3 No data available
Diethylenetriamine 111-40-0 1 ppm TWA ACHIH, (SKIN)
2-ethyl-4-methylimidazole 931-36-2 No data available
4-Methylimidazole 822-36-6 No data available
9. PHYSICAL AND CHEMICAL PROPERTIES
PHYSICAL FORM: ………………………………………………………………….. Liquid.
COLOR: ………………………………………………………………………………… Slightly amber.
ODOR: …………………………………………………………………………………… Ammonia-like
ODOR THRESHOLD: ………………………………………………………………. No data available
pH …………………………………………………………………………………………. 11.86
MELTING POINT / FREEZING POINT ………………………………………… No data available
BOILING POINT (760mm/Hg): ………………………………………………….. > 400 F (204 C) estimated based on similar product.
FLASH POINT: ……………………………………………………………………….. Estimated > 200
F (93 C) estimated based similar product.
AUTO IGNITION TEMPERATURE ……………………………………………… No data available.
LOWER EXPLOSIVE LIMIT (LEL) ……………………………………………… No data available.
UPPER EXPLOSIVE LIMIT (UEL) ……………………………………………… No data available.
VAPOR PRESSURE ………………………………………………………………… < 1 mmHg @ 20 C (estimated based on ingredient data).
SPECIFIC GRAVITY/DENSITY (water = 1)......................................... 1.003
BULK DENSITY.................................................................................. 8.37 lbs./gal. (1.003 kg/L)
PRO-SET
HTP-284 Hardener
Page 4 of 7 Last Revised: 03JAN22
VAPOR DENSITY (air = 1) ................................................................. No data.
EVAPORATIOIN RATE (Butyl Acetate = 1) ....................................... No data.
WATER SOLUBILITY (% BY WT.) ..................................................... No data available.
PARTITION COEFFICIENT, n-OCTANOL/WATER (log Pow) ............ No data available.
KINEMATIC VISCOSITY: ................................................................... 239.3 mm
2
/s @ 20
C
DECOMPOSITION TEMPERATURE : ................................................. No data available.
% VOLATILE BY WEIGHT: ................................................................ ASTM 2369-07 was used to determine the Volatile Matter Content of mixed
epoxy resin and hardener. The combined VOC content for the resin and hardener system is listed below.
VOC Content
Resin/Hardener (g/L) (lbs./gal)
HTP-182 / HTP-284 .................................................................... 2.06 0.02
10. STABILITY AND REACTIVITY
STABILITY: ........................................................................................ Product is stable at normal temperatures and pressures.
REACTIVITY / HAZARDOUS REACTIONS: ....................................... Product will not react by itself. A mass of more than one pound of product
plus an epoxy resin will cause irreversible polymerization with significant heat buildup and pressure.
INCOMPATIBILITIES: ........................................................................ Avoid organic and mineral acids, oxidizing materials, halogenated organic
compounds (e.g., methylene chloride), nitrosating agents, sodium hypochlorite. External heating or self-heating could result in rapid temperature
increase and pressure build up. If such a condition were to occur in a drum, the drum could expand and rupture violently.
CONDITIONS TO AVOID: .................................................................. Avoid excessive heat.
DECOMPOSITION PRODUCTS: ........................................................ Very toxic fumes and gases when burned or otherwise heated to
decomposition. Decomposition products may include, but not limited to: oxides of nitrogen, volatile amines, ammonia, nitric acid, nitrosamines.
11. TOXICOLOGICAL INFORMATION
Ingredient Name CAS# LD50 Oral LD50 Dermal LC50 Inhalation
Polymer of epichlorohydrin / bisphenol A and
diethylenetriamine
31326-29-1 Refer to
Diethylenetriamine
data; ATPE (500
mg/kg)
Refer to
Diethylenetriamine
data; ATPE (1100
mg/kg)
No data available.
Refer to
Diethylenetriamine
data.
1,3-cyclohexanedimethanamine 2579-20-6 700-780 mg/kg 1700 mg/kg No data
Methylenebiscyclohexanamine, 4,4 - 1761-71-3 380 mg/kg >1000 No data
Diethylenetriamine 111-40-0 1620 mg/kg 1090 mg/kg
1
0.07 0.3 mg/L 4hr
aerosol/mist
2-ethyl-4-methylimidazole 931-36-2 731-1000 mg/kg >400 mg/kg No data
4-Methylimidazole 822-36-6 350-751 mg/kg >440 mg/kg No data
Note: Results in this table were derived using the appropriate rat and rabbit species unless otherwise noted.
1.
LC50 data has been generated for this substance by subjecting rats to an airborne aerosol/mist atmosphere in a test chamber. It has
not been determined that this data directly correlates to an inherent hazard of this product as would be expected under normal,
foreseeable or anticipated conditions of use.
ACUTE TOXICITY: ………………………………………………………………….. No specific toxicity data exists for this mixture. Classification is
based on acute toxicity estimation methods using ingredient data.
Oral: ……………………………………………………………………….. Category 4. Harmful if swallowed . May cause gastrointestinal
irritation or ulceration. May cause burns of the mouth and throat.
Dermal: …………………………………………………………………… Category 4. Harmful in contact with skin. Can be absorbed
through the skin in harmful amounts.
Inhalation:………………………………………………………………… Not classified. Based on available data does not meet
classification criteria.
SKIN CORROSION / IRRITATION: …………………………………………….. Category 1B. Causes severe skin burns. Effects may be
immediate. May cause persistent irritation or dermatitis.
SERIOUS EYE DAMAGE / IRRITATION:…………………………………….. Category 1. Causes serious eye damage. May cause blurred
vision. May cause corneal damage resulting in vision impairment or even blindness.
RESPIRATORY SENSITIZATION : ……………………………………………… Not classified. Based on available data does not meet
classification criteria.
SKIN SENSITIZATION:…………………………………………………………….. Category 1. May cause allergic skin reaction..
REPRODUCTIVE TOXICITY: …………………………………………………….. Not classified. Based on available data does not meet classification criteria.
MUTAGENICITY: …………………………………………………………………….. Not classified. Based on available data does not meet classification criteria.
CARCINOGENICITY: ……………………………………………………………….. Category 2. Suspected of causing cancer.
PRO-SET
HTP-284 Hardener
Page 5 of 7 Last Revised: 03JAN22
A component in this product, 4-Methyleimidazole, present at less than 0.5%, is suspected of causing cancer and is listed by IARC as a Group 2B
carcinogen. Under the conditions of 2-year NTP feed studies, there was no evidence of carcinogenic activity of 4-Methylimidazole in male rats
exposed to 625, 1,250 and 2,500 ppm. There was equivocal evidence of carcinogenic activity of 4-Methylimidazole in female rats based on
increased incidences of mononuclear cell leukemia. There was clear evidence of carcinogenic activity of 4-Methylimidazole in male and female
mice based on increased incidences of alveolar/bronchiolar neoplasms.
SPECIFIC TARGET ORGAN TOXICITY (Single Exposure): ………….. STOT SE Category 3. May cause irritation to the upper respiratory tract.
This product contains a component (diethylenetriamine) that is highly toxic by inhalation when aerosolized due to spraying or when a mist is
formed due to heating. It is advised that exposure not occur to product that is sprayed or heated. While this product does not meet the
classification for a respiratory sensitizer, components of this product can cause aggravation of existing respiratory conditions, such as asthma.
SPECIFIC TARGET ORGAN TOXICITY (Repeated Exposure): …….. STOT RE Category 2. May cause damage to organs through prolonged or
repeated exposure if swallowed. Repeated ingestion can result in damage to the following organs/biological systems: liver, muscles, skeletal.
ASPIRATION HAZARD : …………………………………………………………… Not classified. Based on available data does not meet classification criteria.
OTHER HEALTH HAZARD INFORMATON : ………………………………… This product is corrosive to skin and mucous membrane tissues. As a result
of this identified hazard, it is anticipated that excessive inhalation of vapors/aerosol/mist may also be corrosive to the respiratory system.
12. ECOLOGICAL INFORMATION
ACUTE AQUATIC TOXICITY :……………………………………………………. No specific test data available for the mixture. Calculated
Estimate: Aquatic Acute Category 2. Toxic to aquatic life. Avoid release to the environment.
CHRONIC AQUATIC TO XICITY: ……………………………………………….. No specific test data available for the mixture. Calculated
Estimate: Aquatic Chronic Category 2. Toxic to aquatic life with long lasting effects. Avoid release to the environment.
PERSISTANCE AND BIODEGRADABILITY : ………………………………. No specific test data available for the mixture.
MOBILITY IN SOIL: …………………………………………………………………. No specific test data available for the mixture.
ADDITIONAL ECOTOXICITY INFORMATION : …………………………….. In the liquid, uncured state, this product may be harmful to
aquatic life with long lasting effects. Prevent release to the environment, sewers and natural waters.
Ingredient CAS# Ecotoxicity Classification Information
Polymer of epichlorohydrin / bisphenol A and
diethylenetriamine
31326-29-1
Not classified
1,3-cyclohexanedimethanamine 2579-20-6 Acute Aquatic Cat. 3; Chronic Aquatic Cat. 3
Methylenebiscyclohexanamine, 4,4 – 1761-71-3 Acute Aquatic Cat. 2; Chronic Aquatic Cat. 2
Diethylenetriamine 111-40-0 Not classified
2-ethyl-4-methylimidazole 931-36-2 Acute Aquatic Cat. 3; Chronic Aquatic Cat. 3
4-Methylimidazole 822-36-6 Not classified
13. DISPOSAL CONSIDERATIONS
WASTE DISPOSAL METHOD: ………………………………………………….. Evaluation of this product using RCRA criteria shows that it is not a
hazardous waste, either by listing or characteristics, in its purchased form. It is the responsibility of the user to determine proper disposal
methods.
Incinerate, recycle (fuel blending) or reclaim may be preferred methods when conducted in accordance with federal, state and local regulations.
14. TRANSPORTATION INFORMATION
US DOT
UN NUMBER: …………………………………………………………………………. UN 2735
SHIPPING NAME: ……………………………………………………………………. Polyamines, liquid, corrosive, n.o.s.
TECHNICAL SHIPPING NAME: …………………………………………………. 1,3-cyclohexanedimethanamine
HAZARD CLASS: …………………………………………………………………….. Class 8
PACKING GROUP: ………………………………………………………………….. PG II
MARINE POLLUTANT: …………………………………………………………….. No
CANADA TDG
UN NUMBER: …………………………………………………………………………. UN 2735
SHIPPING NAME: ……………………………………………………………………. Polyamines, liquid, corrosive, n.o.s.
TECHNICAL SHIPPING NAME: …………………………………………………. 1,3-cyclohexanedimethanamine
HAZARD CLASS: …………………………………………………………………….. Class 8
PACKING GROUP: ………………………………………………………………….. PG II
MARINE POLLUTANT: …………………………………………………………….. No
IMDG
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HTP-284 Hardener
Page 6 of 7 Last Revised: 03JAN22
UN NUMBER: …………………………………………………………………………. UN 2735
SHIPPING NAME: ……………………………………………………………………. Polyamines, liquid, corrosive, n.o.s.
TECHNICAL SHIPPING NAME: …………………………………………………. 1,3-cyclohexanedimethanamine
HAZARD CLASS: …………………………………………………………………….. Class 8
PACKING GROUP: ………………………………………………………………….. PG II
EmS Number: ………………………………………………………………………… F-A, S-B
MARINE POLLUTANT ……………………………………………………………… Yes
ICAO/IATA
UN NUMBER: …………………………………………………………………………. UN 2735
SHIPPING NAME: ……………………………………………………………………. Polyamines, liquid, corrosive, n.o.s.
TECHNICAL SHIPPING NAME: …………………………………………………. 1,3-cyclohexanedimethanamine
HAZARD CLASS: …………………………………………………………………….. Class 8
PACKING GROUP: ………………………………………………………………….. PG II
MARINE POLLUTANT: …………………………………………………………….. Yes
15. REGULATORY INFORMATION
COUNTRY INVENTORY LIST STATUS
United States TSCA All ingredients are listed or otherwise compliant.
Europe EINECS or ELINCS All ingredients are listed or otherwise compliant.
Canada CEPA (DSL/NDSL) CAS# 822-36-6 is on NDSL only. All other ingredients are DSL listed.
Australia AICS All ingredients are listed or otherwise compliant.
Japan ENCS All ingredients are listed or otherwise compliant.
South Korea KECI All ingredients are listed or otherwise compliant.
China IECSC All ingredients are listed or otherwise compliant.
Philippines PICCS All ingredients are listed or otherwise compliant.
US EPA TSCA Specific Requirements: …………………………………….. No data available.
Canada WHMIS Confidential Business Information (CBI): ………….. No data available.
US EPA SARA TITTLE III Reporting and Notification Requirements:
Subject to Section 302 (TPQ) ……………………………………………… No data available.
Subject to Section 304 (RQ) ……………………………………………….. No data available.
Subject to Section 311 or 312 …………………………………………….. Refer to health and physical classifications in Section 2.
Subject to Section 313 ………………………………………………………. No data available.
US STATE REGULATORY INFORMATION:
The following chemicals may be specifically regulated by individual states. For details on state regulatory requirements you should contact the
appropriate state agency.
COMPONENT NAM E
/CAS NUMBER STATE CODE
4-Methylimidazole
822-36-6
1
CA
Diethylenetriamine
111-40-0 PA
1,3-cyclohexanedimethanamine
2579-20-6 PA, NJ
1.
These substances are known to the state of California to cause cancer or reproductive harm, or both.
16. OTHER INFORMATION
REASON FOR ISSUE:……………………………………………………………… Change to Section 15.
SDS CONTACT: ……………………………………………………………………… safety@gougeon.com
TITLE: …………………………………………………………………………………… Director of Product Safety and Regulatory Compliance
APPROVAL DATE: …………………………………………………………………. January 3, 2022
SUPERSEDES DATE: ……………………………………………………………… January 15, 2019
SDS VERSION: ………………………………………………………………………. HTP-284-2022a
OTHER HAZARD INFORMATION AND RATING SYSTEMS:
HMIS RATING NFPA 704 CODES
PRO-SET
HTP-284 Hardener
Page 7 of 7 Last Revised: 03JAN22
HEALTH: 3
FLAMMABILITY: 1
PHYSICAL HAZARD: 0
PERSONAL PROTECTION:
Approximate HMIS and NFPA Risk Ratings Legend:
0 = Low or None; 1 = Slight; 2 = Moderate; 3 = Serious; 4 = Severe
Information in this document is furnished without warranty, expressed or implied, except that it is accurate to the best knowledge of Gougeon Brothers,
Inc. The data on this sheet is related only to the specific material designated herein. Gougeon Brothers, Inc. assumes no legal responsibility for use or
reliance upon these data.
3 0
1
2
by | Sep 27, 2025
SAFETY DATA SHEET
Last Revised: 03JAN22
1. CHEMICAL PRODUCT AND COMPANY IDENTIFICATION
PRODUCT NAME: ……………………………………… PRO-SET
HTP-284 Hardener
APPLICABLE PRODUCT CODES: ………………. HTP-284, HTP-284-1, HTP-284-2, HTP-284-3, HTP-284-QC-3, HTP-284-4, HTP-284-QC-4
CHEMICAL FAMILY: ………………………………….. Polyamine-imidazole mixture.
INTENDED PRODUCT USES: ……………………… Curing agent for epoxy resins.
PRODUCT RESTRICTIONS: ……………………….. None identified.
SDS VERSION: …………………………………………. HTP-284-2022a
MANUFACTURER: EMERGENCY TELEPHONE NUMBERS (24 HRS):
Gougeon Brothers, Inc. Transportation
100 Patterson Ave. CHEMTREC: ……………….. 800-424-9300 (U.S.)
Bay City, MI 48706, U.S.A. 703-527-3887 (International)
Phone: 888-377-6738 or 989-684-7286 Non-transportation
www.prosetepoxy.com Poison Hotline: …………….. 800-222-1222
2. HAZARDS IDENTIFICATION
Classification of Substance or Mixture
Acute toxicity, Oral, Category 4
Acute toxicity, Dermal, Category 4
Skin corrosion/irritation, Category 1B
Skin sensitizer, Category 1
Eye damage/irritation, Category 1
Carcinogenicity, Category 2
Specific target organ toxicity (repeated exposure – oral), Category 2
Specific target organ toxicity (single exposure), Category 3
Acute aquatic toxicity, Category 2
Chronic aquatic toxicity, Category 2
Label Elements
Hazard Pictogram(s):
Signal Word:
DANGER
Hazard Statements:
H302 Harmful if swallowed
H312 Harmful in contact with skin
H314 Causes severe skin burns and eye damage
H317 May cause an allergic skin reaction
H335 May cause respiratory irritation
H351 Suspected of causing cancer
H372 May cause damage to organs through prolonged or repeated exposure if swallowed
H411 Toxic to aquatic life with long lasting effects
Precautionary Statements:
Prevention
P201 Obtain special instructions before use
P202 Do not handle until all safety precautions have been read and understood
P260 Do not breathe dust/fume/gas/mist/vapors/spray
P264 Wash hands thoroughly after handling
P270 Do not eat, drink or smoke when using this product
P271 Use only outdoors or in a well-ventilated area
P272 Contaminated work clothing should not be allowed out of the workplace
P273 Avoid release to the environment
P280 Wear protective gloves/protective clothing/eye protection/face protection
Response
P301 + P330 + 331 IF SWALLOWED: Rinse mouth. Do NOT induce vomiting.
P303 + P361 + P353 IF ON SKIN (or hair): Take off immediately all contaminated clothing. Rinse or wash skin with soap and water (or
shower).
P304 + P340 IF INHALED: Remove person to fresh air and keep comfortable for breathing
PRO-SET
HTP-284 Hardener
Page 2 of 7 Last Revised: 03JAN22
P305 + P351 + P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do.
Continue rinsing.
P308 + P313 IF exposed or concerned: Get medical attention/advice
P310 Immediately call a POISON CENTER or doctor.
P314 Get medical advice/attention if you feel unwell.
P333 + P313 If skin irritation or rash occurs: Get medical attention/advice
P362 + P364 Take of contaminated clothing and wash it before reuse
P391 Collect spillage
Storage
P403 + P233 Store in a well-ventilated place. Keep container tightly closed.
P405 Store locked up.
Disposal
P501 Dispose of contents and container according to local, state, national and International regulations
Other Hazards
None known.
3. COMPOSITION/INFORMATION ON HAZARDOUS INGREDIENTS
INGREDIENT NAME CAS # CONCENTRATION (%)
Polymer of epichlorohydrin / bisphenol A and diethylenetriamine 31326-29-1 15-40
1,3-cyclohexanedimethanamine 2579-20-6 10-30
Methylenebiscyclohexanamine, 4,4 – 1761-71-3 10-30
Diethylenetriamine 111-40-0 7-13
2-ethyl-4-methylimidazole 931-36-2 1-5
4-Methylimidazole 822-36-6 0.1-1.5
The exact chemical identity and/or exact percentage (concentration) of each ingredient may be held as confidential business information
(CBI). Any ingredient not disclosed in this section may have been determined not to be hazardous to health or the environment, or it may
be present at a level below its disclosure threshold.
4. FIRST AID MEASURES
FIRST AID FOR EYES ……………………………………………………………… SYMPTOMS: Causes eye burns and eye damage. RESPONSE: Flush
immediately with water for at least 15 minutes. Remove contact lenses if present and easy to do. Immediately call a POISON CONTROL CENTER
or doctor.
FIRST AID FOR SKIN ………………………………………………………………. SYMPTOMS: Causes skin burns, redness and irritation. May cause allergic
skin reaction and sensitization. RESPONSE: Immediately wash skin with soap and water. Immediately call a POISON CONTROL CENTER or
doctor.
FIRST AID FOR INHALATION…………………………………………………… SYMPTOMS: Can cause respiratory irritation, shortness of breath or cough.
RESPONSE: Remove to fresh air if effects occur and keep comfortable for breathing. Immediately call POISON CONTROL CENTER or doctor.
FIRST AID FOR INGESTION …………………………………………………….. SYMPTOMS: May cause gastrointestinal irritation or ulceration. May
cause burns of the mouth and throat. RESPONSE: Rinse mouth with water. DO NOT induce vomiting. If vomiting should occur, keep airway
clear. Immediately call POISON CONTROL CENTER or doctor.
NOTES TO PHYSICIAN: Use of gastric lavage or emesis is contraindicated. Although product does not meet criteria for aspiration toxicity, vomitus
may cause lung injury. Possible perforation of stomach or esophagus should be investigated. Consider endotracheal/esophageal control if lavage
is done. Do not give chemical antidotes. Asphyxia from glottal edema may occur. Marked decrease in blood pressure may occur with moist rales,
frothy sputum, and high pulse pressure. Treat symptomatically.
5. FIRE FIGHTING MEASURES
EXTINGUISHING MEDIA: ………………………………………………………… SUITABLE: Foam, carbon dioxide (CO2), dry chemical. NON-SUITABLE:
Direct water stream.
FIRE AND EXPLOSION HAZARDS: ………………………………………….. During a fire, smoke may contain the original materials in addition to
combustion products of varying composition which may be toxic and/or irritating. Combustion products may include, but are not limited to: oxides
of nitrogen, carbon monoxide, carbon dioxide, volatile amines, ammonia, nitric acid, nitrosamines. When mixed with sawdust, wood chips, or
other cellulosic material, spontaneous combustion can occur under certain conditions. Heat is generated as the air oxidizes the amine. If the heat
is not dissipated quickly enough, it can ignite the sawdust.
SPECIAL FIRE FIGHTING PROCEDURES: ………………………………… Use full-body protective gear and a self-contained breathing apparatus.
Use of water may generate toxic aqueous solutions. Do not allow water run-off from fighting fire to enter drains or other water courses.
6. ACCIDENTAL RELEASE MEASURES
PRO-SET
HTP-284 Hardener
Page 3 of 7 Last Revised: 03JAN22
EMERGENCY PROCEDURES : …………………………………………………. Keep unnecessary and unprotected personnel from entering area. Use
appropriate safety and personal protective equipment as indicated in Section 8.
MITIGATION AND CLEAN UP PROCEDURES: …………………………… Stop leak without additional risk. Isolate area. Dike and absorb with inert
material (e.g., sand) and collect in a suitable, closed container. Do not use sawdust, wood chips or other cellulosic materials to absorb the spill, as
the possibility for spontaneous combustion exists. Warm, soapy water may be used to clean residual.
ENVIRONMENTAL PRECAUTIONS: ………………………………………….. Prevent from entering into soil, ditches, sewers, waterways and
groundwater. See Section 12 for environmental impact information.
7. HANDLING AND STORAGE
STORAGE TEMPERATURE (min./max.): …………………………………… 40 F (4 C) / 90 F (32 C).
STORAGE: …………………………………………………………………………….. Store in cool, dry place away from high temperatures and moisture. Keep
container tightly closed. Store in a secure location with restricted access or store locked up.
HANDLING PRECAUTIONS: ……………………………………………………. DO NOT spray apply or heat this product. Use only outdoors or with
adequate ventilation. If ventilation cannot be made adequate, refer to respiratory protection in Section 8. Do not breathe vapors or mists from
heated material. Do not breathe concentrated vapors. Avoid skin and eye contact. Wash thoroughly after handling. When mixed with epoxy
resin this product causes an exothermic reaction, which in large masses, can produce enough heat to damage or ignite surrounding materials and
emit fumes and vapors that vary widely in composition and toxicity. Do not breathe vapors or fumes from uncontrolled exotherming masses.
8. EXPOSURE CONTROLS/PERSONAL PROTECTION
ENGINEERING CONTROLS: ……………………………………………………. Use with adequate general ventilation and/or local ventilation to keep
exposures below established limits.
EYE PROTECTION GUIDELINES: …………………………………………….. Chemical splash-proof goggles or face shield.
SKIN PROTECTION GUIDELINES: ……………………………………………. Wear liquid-proof, chemical resistant gloves (nitrile-butyl rubber, neoprene,
butyl rubber or natural rubber) and full body-covering clothing. Use of an impervious material may be used for areas of the skin more likely to
come in contact.
RESPIRATORY PROTECTION GUIDELINES: …………………………….. When ventilation cannot be made adequate enough to keep exposures
below established limits, use a NIOSH approved respirator with an organic vapor cartridge, organic vapor cartridge + P100, or a multi-contaminant
cartridge, depending on specific workplace conditions. Consult with your respirator and cartridge supplier to ensure proper selection of respirator
and cartridge based on ingredients listed in Section 3 and specific workplace conditions. Use and select a respirator according the guidelines
established in OSHA 1910.134 or other applicable respiratory protection standard.
ADDITIONAL PROTECTIVE MEASURES: ………………………………….. Use where there is immediate access to safety shower and emergency eye
wash. Wash thoroughly after use. Contact lens should not be worn when working with this material. Generally speaking, working cleanly and
following basic precautionary measures will greatly minimize the potential for harmful exposure to this product under normal use conditions.
OCCUPATIONAL EXPOSURE LIMITS: ……………………………………… Exposure limits may not be established for this product as a whole. For
established exposure limits of specific ingredients in this product, or other available exposure limit information, refer to the table below.
Ingredient Name CAS# Exposure Limit Information
Polymer of epichlorohydrin / bisphenol A and
diethylenetriamine
31326-29-1
No data available
1,3-cyclohexanedimethanamine 2579-20-6 No data available
Methylenebiscyclohexanamine, 4,4 – 1761-71-3 No data available
Diethylenetriamine 111-40-0 1 ppm TWA ACHIH, (SKIN)
2-ethyl-4-methylimidazole 931-36-2 No data available
4-Methylimidazole 822-36-6 No data available
9. PHYSICAL AND CHEMICAL PROPERTIES
PHYSICAL FORM: ………………………………………………………………….. Liquid.
COLOR: ………………………………………………………………………………… Slightly amber.
ODOR: …………………………………………………………………………………… Ammonia-like
ODOR THRESHOLD: ………………………………………………………………. No data available
pH …………………………………………………………………………………………. 11.86
MELTING POINT / FREEZING POINT ………………………………………… No data available
BOILING POINT (760mm/Hg): ………………………………………………….. > 400 F (204 C) estimated based on similar product.
FLASH POINT: ……………………………………………………………………….. Estimated > 200
F (93 C) estimated based similar product.
AUTO IGNITION TEMPERATURE ……………………………………………… No data available.
LOWER EXPLOSIVE LIMIT (LEL) ……………………………………………… No data available.
UPPER EXPLOSIVE LIMIT (UEL) ……………………………………………… No data available.
VAPOR PRESSURE ………………………………………………………………… < 1 mmHg @ 20 C (estimated based on ingredient data).
SPECIFIC GRAVITY/DENSITY (water = 1)......................................... 1.003
BULK DENSITY.................................................................................. 8.37 lbs./gal. (1.003 kg/L)
PRO-SET
HTP-284 Hardener
Page 4 of 7 Last Revised: 03JAN22
VAPOR DENSITY (air = 1) ................................................................. No data.
EVAPORATIOIN RATE (Butyl Acetate = 1) ....................................... No data.
WATER SOLUBILITY (% BY WT.) ..................................................... No data available.
PARTITION COEFFICIENT, n-OCTANOL/WATER (log Pow) ............ No data available.
KINEMATIC VISCOSITY: ................................................................... 239.3 mm
2
/s @ 20
C
DECOMPOSITION TEMPERATURE : ................................................. No data available.
% VOLATILE BY WEIGHT: ................................................................ ASTM 2369-07 was used to determine the Volatile Matter Content of mixed
epoxy resin and hardener. The combined VOC content for the resin and hardener system is listed below.
VOC Content
Resin/Hardener (g/L) (lbs./gal)
HTP-182 / HTP-284 .................................................................... 2.06 0.02
10. STABILITY AND REACTIVITY
STABILITY: ........................................................................................ Product is stable at normal temperatures and pressures.
REACTIVITY / HAZARDOUS REACTIONS: ....................................... Product will not react by itself. A mass of more than one pound of product
plus an epoxy resin will cause irreversible polymerization with significant heat buildup and pressure.
INCOMPATIBILITIES: ........................................................................ Avoid organic and mineral acids, oxidizing materials, halogenated organic
compounds (e.g., methylene chloride), nitrosating agents, sodium hypochlorite. External heating or self-heating could result in rapid temperature
increase and pressure build up. If such a condition were to occur in a drum, the drum could expand and rupture violently.
CONDITIONS TO AVOID: .................................................................. Avoid excessive heat.
DECOMPOSITION PRODUCTS: ........................................................ Very toxic fumes and gases when burned or otherwise heated to
decomposition. Decomposition products may include, but not limited to: oxides of nitrogen, volatile amines, ammonia, nitric acid, nitrosamines.
11. TOXICOLOGICAL INFORMATION
Ingredient Name CAS# LD50 Oral LD50 Dermal LC50 Inhalation
Polymer of epichlorohydrin / bisphenol A and
diethylenetriamine
31326-29-1 Refer to
Diethylenetriamine
data; ATPE (500
mg/kg)
Refer to
Diethylenetriamine
data; ATPE (1100
mg/kg)
No data available.
Refer to
Diethylenetriamine
data.
1,3-cyclohexanedimethanamine 2579-20-6 700-780 mg/kg 1700 mg/kg No data
Methylenebiscyclohexanamine, 4,4 - 1761-71-3 380 mg/kg >1000 No data
Diethylenetriamine 111-40-0 1620 mg/kg 1090 mg/kg
1
0.07 0.3 mg/L 4hr
aerosol/mist
2-ethyl-4-methylimidazole 931-36-2 731-1000 mg/kg >400 mg/kg No data
4-Methylimidazole 822-36-6 350-751 mg/kg >440 mg/kg No data
Note: Results in this table were derived using the appropriate rat and rabbit species unless otherwise noted.
1.
LC50 data has been generated for this substance by subjecting rats to an airborne aerosol/mist atmosphere in a test chamber. It has
not been determined that this data directly correlates to an inherent hazard of this product as would be expected under normal,
foreseeable or anticipated conditions of use.
ACUTE TOXICITY: ………………………………………………………………….. No specific toxicity data exists for this mixture. Classification is
based on acute toxicity estimation methods using ingredient data.
Oral: ……………………………………………………………………….. Category 4. Harmful if swallowed . May cause gastrointestinal
irritation or ulceration. May cause burns of the mouth and throat.
Dermal: …………………………………………………………………… Category 4. Harmful in contact with skin. Can be absorbed
through the skin in harmful amounts.
Inhalation:………………………………………………………………… Not classified. Based on available data does not meet
classification criteria.
SKIN CORROSION / IRRITATION: …………………………………………….. Category 1B. Causes severe skin burns. Effects may be
immediate. May cause persistent irritation or dermatitis.
SERIOUS EYE DAMAGE / IRRITATION:…………………………………….. Category 1. Causes serious eye damage. May cause blurred
vision. May cause corneal damage resulting in vision impairment or even blindness.
RESPIRATORY SENSITIZATION : ……………………………………………… Not classified. Based on available data does not meet
classification criteria.
SKIN SENSITIZATION:…………………………………………………………….. Category 1. May cause allergic skin reaction..
REPRODUCTIVE TOXICITY: …………………………………………………….. Not classified. Based on available data does not meet classification criteria.
MUTAGENICITY: …………………………………………………………………….. Not classified. Based on available data does not meet classification criteria.
CARCINOGENICITY: ……………………………………………………………….. Category 2. Suspected of causing cancer.
PRO-SET
HTP-284 Hardener
Page 5 of 7 Last Revised: 03JAN22
A component in this product, 4-Methyleimidazole, present at less than 0.5%, is suspected of causing cancer and is listed by IARC as a Group 2B
carcinogen. Under the conditions of 2-year NTP feed studies, there was no evidence of carcinogenic activity of 4-Methylimidazole in male rats
exposed to 625, 1,250 and 2,500 ppm. There was equivocal evidence of carcinogenic activity of 4-Methylimidazole in female rats based on
increased incidences of mononuclear cell leukemia. There was clear evidence of carcinogenic activity of 4-Methylimidazole in male and female
mice based on increased incidences of alveolar/bronchiolar neoplasms.
SPECIFIC TARGET ORGAN TOXICITY (Single Exposure): ………….. STOT SE Category 3. May cause irritation to the upper respiratory tract.
This product contains a component (diethylenetriamine) that is highly toxic by inhalation when aerosolized due to spraying or when a mist is
formed due to heating. It is advised that exposure not occur to product that is sprayed or heated. While this product does not meet the
classification for a respiratory sensitizer, components of this product can cause aggravation of existing respiratory conditions, such as asthma.
SPECIFIC TARGET ORGAN TOXICITY (Repeated Exposure): …….. STOT RE Category 2. May cause damage to organs through prolonged or
repeated exposure if swallowed. Repeated ingestion can result in damage to the following organs/biological systems: liver, muscles, skeletal.
ASPIRATION HAZARD : …………………………………………………………… Not classified. Based on available data does not meet classification criteria.
OTHER HEALTH HAZARD INFORMATON : ………………………………… This product is corrosive to skin and mucous membrane tissues. As a result
of this identified hazard, it is anticipated that excessive inhalation of vapors/aerosol/mist may also be corrosive to the respiratory system.
12. ECOLOGICAL INFORMATION
ACUTE AQUATIC TOXICITY :……………………………………………………. No specific test data available for the mixture. Calculated
Estimate: Aquatic Acute Category 2. Toxic to aquatic life. Avoid release to the environment.
CHRONIC AQUATIC TO XICITY: ……………………………………………….. No specific test data available for the mixture. Calculated
Estimate: Aquatic Chronic Category 2. Toxic to aquatic life with long lasting effects. Avoid release to the environment.
PERSISTANCE AND BIODEGRADABILITY : ………………………………. No specific test data available for the mixture.
MOBILITY IN SOIL: …………………………………………………………………. No specific test data available for the mixture.
ADDITIONAL ECOTOXICITY INFORMATION : …………………………….. In the liquid, uncured state, this product may be harmful to
aquatic life with long lasting effects. Prevent release to the environment, sewers and natural waters.
Ingredient CAS# Ecotoxicity Classification Information
Polymer of epichlorohydrin / bisphenol A and
diethylenetriamine
31326-29-1
Not classified
1,3-cyclohexanedimethanamine 2579-20-6 Acute Aquatic Cat. 3; Chronic Aquatic Cat. 3
Methylenebiscyclohexanamine, 4,4 – 1761-71-3 Acute Aquatic Cat. 2; Chronic Aquatic Cat. 2
Diethylenetriamine 111-40-0 Not classified
2-ethyl-4-methylimidazole 931-36-2 Acute Aquatic Cat. 3; Chronic Aquatic Cat. 3
4-Methylimidazole 822-36-6 Not classified
13. DISPOSAL CONSIDERATIONS
WASTE DISPOSAL METHOD: ………………………………………………….. Evaluation of this product using RCRA criteria shows that it is not a
hazardous waste, either by listing or characteristics, in its purchased form. It is the responsibility of the user to determine proper disposal
methods.
Incinerate, recycle (fuel blending) or reclaim may be preferred methods when conducted in accordance with federal, state and local regulations.
14. TRANSPORTATION INFORMATION
US DOT
UN NUMBER: …………………………………………………………………………. UN 2735
SHIPPING NAME: ……………………………………………………………………. Polyamines, liquid, corrosive, n.o.s.
TECHNICAL SHIPPING NAME: …………………………………………………. 1,3-cyclohexanedimethanamine
HAZARD CLASS: …………………………………………………………………….. Class 8
PACKING GROUP: ………………………………………………………………….. PG II
MARINE POLLUTANT: …………………………………………………………….. No
CANADA TDG
UN NUMBER: …………………………………………………………………………. UN 2735
SHIPPING NAME: ……………………………………………………………………. Polyamines, liquid, corrosive, n.o.s.
TECHNICAL SHIPPING NAME: …………………………………………………. 1,3-cyclohexanedimethanamine
HAZARD CLASS: …………………………………………………………………….. Class 8
PACKING GROUP: ………………………………………………………………….. PG II
MARINE POLLUTANT: …………………………………………………………….. No
IMDG
PRO-SET
HTP-284 Hardener
Page 6 of 7 Last Revised: 03JAN22
UN NUMBER: …………………………………………………………………………. UN 2735
SHIPPING NAME: ……………………………………………………………………. Polyamines, liquid, corrosive, n.o.s.
TECHNICAL SHIPPING NAME: …………………………………………………. 1,3-cyclohexanedimethanamine
HAZARD CLASS: …………………………………………………………………….. Class 8
PACKING GROUP: ………………………………………………………………….. PG II
EmS Number: ………………………………………………………………………… F-A, S-B
MARINE POLLUTANT ……………………………………………………………… Yes
ICAO/IATA
UN NUMBER: …………………………………………………………………………. UN 2735
SHIPPING NAME: ……………………………………………………………………. Polyamines, liquid, corrosive, n.o.s.
TECHNICAL SHIPPING NAME: …………………………………………………. 1,3-cyclohexanedimethanamine
HAZARD CLASS: …………………………………………………………………….. Class 8
PACKING GROUP: ………………………………………………………………….. PG II
MARINE POLLUTANT: …………………………………………………………….. Yes
15. REGULATORY INFORMATION
COUNTRY INVENTORY LIST STATUS
United States TSCA All ingredients are listed or otherwise compliant.
Europe EINECS or ELINCS All ingredients are listed or otherwise compliant.
Canada CEPA (DSL/NDSL) CAS# 822-36-6 is on NDSL only. All other ingredients are DSL listed.
Australia AICS All ingredients are listed or otherwise compliant.
Japan ENCS All ingredients are listed or otherwise compliant.
South Korea KECI All ingredients are listed or otherwise compliant.
China IECSC All ingredients are listed or otherwise compliant.
Philippines PICCS All ingredients are listed or otherwise compliant.
US EPA TSCA Specific Requirements: …………………………………….. No data available.
Canada WHMIS Confidential Business Information (CBI): ………….. No data available.
US EPA SARA TITTLE III Reporting and Notification Requirements:
Subject to Section 302 (TPQ) ……………………………………………… No data available.
Subject to Section 304 (RQ) ……………………………………………….. No data available.
Subject to Section 311 or 312 …………………………………………….. Refer to health and physical classifications in Section 2.
Subject to Section 313 ………………………………………………………. No data available.
US STATE REGULATORY INFORMATION:
The following chemicals may be specifically regulated by individual states. For details on state regulatory requirements you should contact the
appropriate state agency.
COMPONENT NAM E
/CAS NUMBER STATE CODE
4-Methylimidazole
822-36-6
1
CA
Diethylenetriamine
111-40-0 PA
1,3-cyclohexanedimethanamine
2579-20-6 PA, NJ
1.
These substances are known to the state of California to cause cancer or reproductive harm, or both.
16. OTHER INFORMATION
REASON FOR ISSUE:……………………………………………………………… Change to Section 15.
SDS CONTACT: ……………………………………………………………………… safety@gougeon.com
TITLE: …………………………………………………………………………………… Director of Product Safety and Regulatory Compliance
APPROVAL DATE: …………………………………………………………………. January 3, 2022
SUPERSEDES DATE: ……………………………………………………………… January 15, 2019
SDS VERSION: ………………………………………………………………………. HTP-284-2022a
OTHER HAZARD INFORMATION AND RATING SYSTEMS:
HMIS RATING NFPA 704 CODES
PRO-SET
HTP-284 Hardener
Page 7 of 7 Last Revised: 03JAN22
HEALTH: 3
FLAMMABILITY: 1
PHYSICAL HAZARD: 0
PERSONAL PROTECTION:
Approximate HMIS and NFPA Risk Ratings Legend:
0 = Low or None; 1 = Slight; 2 = Moderate; 3 = Serious; 4 = Severe
Information in this document is furnished without warranty, expressed or implied, except that it is accurate to the best knowledge of Gougeon Brothers,
Inc. The data on this sheet is related only to the specific material designated herein. Gougeon Brothers, Inc. assumes no legal responsibility for use or
reliance upon these data.
3 0
1
2
by | Sep 27, 2025
SAFETY DATA SHEET
Last Revised: 03JAN22
1. CHEMICAL PRODUCT AND COMPANY IDENTIFICATION
PRODUCT NAME: ……………………………………… PRO-SET
HTP-280 Hardener
APPLICABLE PRODUCT CODES: ………………. HTP-280, HTP-280-1, HTP-280-2, HTP-280-3, HTP-280-4, HTP-280-5
CHEMICAL FAMILY: ………………………………….. Polyamine-imidazole mixture.
INTENDED PRODUCT USES: ……………………… Curing agent for epoxy resins.
PRODUCT RESTRICTIONS: ……………………….. None identified.
SDS VERSION: …………………………………………. HTP-280-2022a
MANUFACTURER: EMERGENCY TELEPHONE NUMBERS (24 HRS):
Gougeon Brothers, Inc. Transportation
100 Patterson Ave. CHEMTREC: ……………….. 800-424-9300 (U.S.)
Bay City, MI 48706, U.S.A. 703-527-3887 (International)
Phone: 888-377-6738 or 989-684-7286 Non-transportation
www.prosetepoxy.com Poison Hotline: …………….. 800-222-1222
2. HAZARDS IDENTIFICATION
Classification of Substance or Mixture
Acute toxicity, Oral, Category 4
Skin corrosion/irritation, Category 1B
Skin sensitizer, Category 1
Eye damage/irritation, Category 1
Carcinogenicity, Category 2
Specific target organ toxicity (repeated exposure – oral), Category 2
Acute aquatic toxicity, Category 3
Chronic aquatic toxicity, Category 2
Label Elements
Hazard Pictogram(s):
Signal Word:
DANGER
Hazard Statements:
H302 Harmful if swallowed
H314 Causes severe skin burns and eye damage
H317 May cause an allergic skin reaction
H351 Suspected of causing cancer
H372 May cause damage to organs through prolonged or repeated exposure if swallowed
H411 Toxic to aquatic life with long lasting effects
Precautionary Statements:
Prevention
P201 Obtain special instructions before use
P202 Do not handle until all safety precautions have been read and understood
P260 Do not breathe dust/fume/gas/mist/vapors/spray
P264 Wash hands thoroughly after handling
P270 Do not eat, drink or smoke when using this product
P272 Contaminated work clothing should not be allowed out of the workplace
P273 Avoid release to the environment
P280 Wear protective gloves/protective clothing/eye protection/face protection
Response
P301 + P330 + 331 IF SWALLOWED: Rinse mouth. Do NOT induce vomiting.
P303 + P361 + P353 IF ON SKIN (or hair): Take off immediately all contaminated clothing. Rinse or wash skin with soap and water (or
shower).
P304 + P340 IF INHALED: Remove person to fresh air and keep comfortable for breathing
P305 + P351 + P338 + P310 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do.
Continue rinsing.
P308 + P313 IF exposed or concerned: Get medical attention/advice
P310 Immediately call POISON CENTER or doctor.
P333 + P313 If irritation or rash occurs: Get medical attention/advice
P362 + P364 Take of contaminated clothing and wash it before reuse
PRO-SET
HTP-280 Hardener
Page 2 of 6 Last Revised: 03JAN22
P391 Collect spillage
Storage
P405 Store locked up.
Disposal
P501 Dispose of contents and container according to local, state, national and International regulations
Other Hazards
None known.
3. COMPOSITION/INFORMATION ON HAZARDOUS INGREDIENTS
INGREDIENT NAME CAS # CONCENTRATION (%)
Isophoronediamine 2855-13-2 45-70
Methylenebiscyclohexanamine, 4,4 – 1761-71-3 30-60
2-ethyl-4-methylimidazole 931-36-2 1-5
4-Methylimidazole 822-36-6 0.1-1.0
The exact chemical identity and/or exact percentage (concentration) of each ingredient may be held as confidential business information
(CBI). Any ingredient not disclosed in this section may have been determined not to be hazardous to health or the environment, or it may
be present at a level below its disclosure threshold.
4. FIRST AID MEASURES
FIRST AID FOR EYES ……………………………………………………………… SYMPTOMS: Causes eye burns and eye damage. RESPONSE: Flush
immediately with water for at least 15 minutes. Remove contact lenses if present and easy to do. Immediately call a POISON CONTROL CENTER
or doctor.
FIRST AID FOR SKIN ………………………………………………………………. SYMPTOMS: Causes skin burns, redness and irritation. May cause allergic
skin reaction and sensitization. RESPONSE: Immediately wash skin with soap and water. Immediately call a POISON CONTROL CENTER or
doctor.
FIRST AID FOR INHALATION…………………………………………………… SYMPTOMS: Can cause respiratory irritation, shortness of breath or cough.
RESPONSE: Remove to fresh air if effects occur and keep comfortable for breathing. Seek medical attention if symptoms persist or you feel
unwell.
FIRST AID FOR INGESTION …………………………………………………….. SYMPTOMS: May cause gastrointestinal irritation or ulceration. May
cause burns of the mouth and throat. RESPONSE: Rinse mouth with water. DO NOT induce vomiting. If vomiting should occur, keep airway
clear. Immediately call POISON CONTROL CENTER or doctor.
5. FIRE FIGHTING MEASURES
EXTINGUISHING MEDIA: ………………………………………………………… SUITABLE: Foam, carbon dioxide (CO2), dry chemical. NON-SUITABLE:
Direct water stream.
FIRE AND EXPLOSION HAZARDS: ………………………………………….. During a fire, smoke may contain the original materials in addition to
combustion products of varying composition which may be toxic and/or irritating. Combustion products may include, but are not limited to: oxides
of nitrogen, carbon monoxide, carbon dioxide, volatile amines, ammonia, nitric acid, nitrosamines. When mixed with sawdust, wood chips, or
other cellulosic material, spontaneous combustion can occur under certain conditions. Heat is generated as the air oxidizes the amine. If the heat
is not dissipated quickly enough, it can ignite the sawdust.
SPECIAL FIRE FIGHTING PROCEDURES: ………………………………… Use full-body protective gear and a self-contained breathing apparatus.
Use of water may generate toxic aqueous solutions. Do not allow water run-off from fighting fire to enter drains or other water courses.
6. ACCIDENTAL RELEASE MEASURES
EMERGENCY PROCEDURES : …………………………………………………. Keep unnecessary and unprotected personnel from entering area. Use
appropriate safety and personal protective equipment as indicated in Section 8.
MITIGATION AND CLEAN UP PROCEDURES: …………………………… Stop leak without additional risk. Isolate area. Dike and absorb with inert
material (e.g., sand) and collect in a suitable, closed container. Do not use sawdust, wood chips or other cellulosic materials to absorb the spill, as
the possibility for spontaneous combustion exists. Warm, soapy water may be used to clean residual.
ENVIRONMENTAL PRECAUTIONS: ………………………………………….. Prevent from entering into soil, ditches, sewers, waterways and
groundwater. See Section 12 for environmental impact information.
7. HANDLING AND STORAGE
STORAGE TEMPERATURE (min./max.): …………………………………… 40 F (4 C) / 90 F (32 C).
PRO-SET
HTP-280 Hardener
Page 3 of 6 Last Revised: 03JAN22
STORAGE: …………………………………………………………………………….. Store in cool, dry place away from high temperatures and moisture. Keep
container tightly closed. Store in a secure location with restricted access or store locked up.
HANDLING PRECAUTIONS: ……………………………………………………. Use with adequate ventilation. Do not breathe vapors or mists from heated
material. Avoid exposure to concentrated vapors. Avoid skin and eye contact. Wash thoroughly after handling. When mixed with epoxy resin
this product causes an exothermic reaction, which in large masses, can produce enough heat to damage or ignite surrounding materials and emit
fumes and vapors that vary widely in composition and toxicity. Do not breathe vapors or fumes from uncontrolled exotherming masses.
8. EXPOSURE CONTROLS/PERSONAL PROTECTION
ENGINEERING CONTROLS : ……………………………………………………. Use with adequate general ventilation and/or local ventilation to keep
exposures below established limits.
EYE PROTECTION GUIDELINES: …………………………………………….. Chemical splash-proof goggles or face shield.
SKIN PROTECTION GUIDELINES: ……………………………………………. Wear liquid-proof, chemical resistant gloves (nitrile-butyl rubber, neoprene,
butyl rubber or natural rubber) and full body-covering clothing.
RESPIRATORY PROTECTION GUIDELINES: …………………………….. When ventilation cannot be made adequate enough to keep exposures
below established limits, use a NIOSH approved respirator with an organic vapor cartridge, organic vapor cartridge + P100, or a multi-contaminant
cartridge, depending on specific workplace conditions. Consult with your respirator and cartridge supplier to ensure proper selection of respirator
and cartridge based on ingredients listed in Section 3 and specific workplace conditions. Use and select a respirator according the guidelines
established in OSHA 1910.134 or other applicable respiratory protection standard.
ADDITIONAL PROTECTIVE MEASURES: ………………………………….. Use where there is immediate access to safety shower and emergency eye
wash. Wash thoroughly after use. Contact lens should not be worn when working with this material. Generally speaking, working cleanly and
following basic precautionary measures will greatly minimize the potential for harmful exposure to this product under normal use conditions.
OCCUPATIONAL EXPOSURE LIMITS: ……………………………………… Exposure limits may not be established for this product as a whole. For
established exposure limits of specific ingredients in this product, or other available exposure limit information, refer to the table below.
Ingredient Name CAS# Exposure Limit Information
Isophoronediamine 2855-13-2 No data available
Methylenebiscyclohexanamine, 4,4 – 1761-71-3 No data available
2-ethyl-4-methylimidazole 931-36-2 No data available
4-Methylimidazole 822-36-6 No data available
9. PHYSICAL AND CHEMICAL PROPERTIES
PHYSICAL FORM: ………………………………………………………………….. Liquid.
COLOR: ………………………………………………………………………………… Slight amber
ODOR: …………………………………………………………………………………… Ammonia-like
ODOR THRESHOLD: ………………………………………………………………. No data available
pH …………………………………………………………………………………………. 11.74
MELTING POINT / FREEZING POINT ………………………………………… No data.
BOILING POINT (760mm/Hg): ………………………………………………….. > 400 F (204 C) estimated based on similar product.
FLASH POINT: ……………………………………………………………………….. Estimated > 200
F (93 C) estimated based similar product.
AUTO IGNITION TEMPERATURE ……………………………………………… No data.
LOWER EXPLOSIVE LIMIT (LEL) ……………………………………………… No data.
UPPER EXPLOSIVE LIMIT (UEL) ……………………………………………… No data.
VAPOR PRESSURE ………………………………………………………………… < 1 mmHg @ 20 C (estimated based on ingredient data).
SPECIFIC GRAVITY/DENSITY (water = 1)......................................... 0.94
BULK DENSITY.................................................................................. 7.85 lbs./gal. (0.94kg/L)
VAPOR DENSITY (air = 1) ................................................................. No data.
EVAPORATIOIN RATE (Butyl Acetate = 1) ....................................... No data.
WATER SOLUBILITY (% BY WT.) ..................................................... No data.
PARTITION COEFFICIENT, n-OCTANOL/WATER (log Pow) ............ No data.
KINEMATIC VISCOSITY: ................................................................... 36.1 (mm
2
/s @ 20
C)
DECOMPOSITION TEMPERATURE : ................................................. No data available.
% VOLATILE BY WEIGHT: ................................................................ ASTM 2369-07 was used to determine the Volatile Matter Content of mixed
epoxy resin and hardener. The combined VOC content for the resin and hardener system is listed below.
VOC Content
Resin/Hardener (g/L) (lb/gal)
HTP-180 / HTP-280 .................................................................... 1.28 0.01
10. STABILITY AND REACTIVITY
STABILITY: ........................................................................................ Product is stable at normal temperatures and pressures.
REACTIVITY / HAZARDOUS REACTIONS: ....................................... Product will not react by itself. A mass of more than one pound of product
plus an epoxy resin will cause irreversible polymerization with significant heat buildup and pressure.
PRO-SET
HTP-280 Hardener
Page 4 of 6 Last Revised: 03JAN22
INCOMPATIBILITIES: ........................................................................ Avoid organic and mineral acids, oxidizing materials, halogenated organic
compounds (e.g., methylene chloride), nitrosating agents, sodium hyprochlorite. External heating or self-heating could result in rapid temperature
increase and pressure build up. If such a condition were to occur in a drum, the drum could expand and rupture violently.
CONDITIONS TO AVOID: .................................................................. Avoid excessive heat.
DECOMPOSITION PRODUCTS: ........................................................ Very toxic fumes and gases when burned or otherwise heated to
decomposition. Decomposition products may include, but not limited to: oxides of nitrogen, volatile amines, ammonia, nitric acid, nitrosamines.
11. TOXICOLOGICAL INFORMATION
Ingredient Name CAS# LD50 Oral LD50 Dermal LC50 Inhalation
Isophoronediamine 2855-13-2 1030 mg/kg >2000 >5.01 mg/l 4h mist
Methylenebiscyclohexanamine, 4,4 – 1761-71-3 380 mg/kg >1000 No data
2-ethyl-4-methylimidazole 931-36-2 731-1000 mg/kg >400 mg/kg No data
4-Methylimidazole 822-36-6 350-751 mg/kg 440 mg/kg No data
Note: Results in this table were derived using the appropriate rat and rabbit species unless otherwise noted.
ACUTE TOXICITY: ………………………………………………………………….. No specific toxicity data exists for this mixture. Classification is
based on acute toxicity estimation methods using ingredient data.
Oral: ……………………………………………………………………….. Category 4. Harmful if swallowed . May cause gastrointestinal
irritation or ulceration. May cause burns of the mouth and throat.
Dermal: …………………………………………………………………… Not classified. Does not meet classification criteria.
Inhalation:………………………………………………………………… Not classified. Does not meet classification criteria.
SKIN CORROSION / IRRITATION: …………………………………………….. Category 1B. Causes severe skin burns. Effects may be
immediate. May cause persistent irritation or dermatitis.
SERIOUS EYE DAMAGE / IRRITATION:…………………………………….. Category 1. Causes serious eye damage. May cause blurred
vision. May cause corneal damage resulting in vision impairment or even blindness.
RESPIRATORY SENSITIZATION : ……………………………………………… No data available.
SKIN SENSITIZATION:…………………………………………………………….. Category 1. May cause allergic skin reaction..
REPRODUCTIVE TOXICITY: …………………………………………………….. Not classified. Does not meet classification criteria.
MUTAGENICITY: …………………………………………………………………….. Not classified. Does not meet classification criteria.
CARCINOGENICITY: ……………………………………………………………….. Category 2. Suspected of causing cancer.
A component in this product, 4-Methyleimidazole, present at less than 0.2%, is suspected of causing cancer and is listed by IARC as a Group 2B
carcinogen. Under the conditions of 2-year NTP feed studies, there was no evidence of carcinogenic activity of 4-Methylimidazole in male rats
exposed to 625, 1,250 and 2,500 ppm. There was equivocal evidence of carcinogenic activity of 4-Methylimidazole in female rats based on
increased incidences of mononuclear cell leukemia. There was clear evidence of carcinogenic activity of 4-Methylimidazole in male and female
mice based on increased incidences of alveolar/bronchiolar neoplasms.
SPECIFIC TARGET ORGAN TOXICITY (Single Exposure): ………….. Not classified. Does not meet classification criteria.
SPECIFIC TARGET ORGAN TOXICITY (Repeated Exposure): …….. STOT RE Category 2. May cause damage to organs through prolonged or
repeated exposure if swallowed. Repeated ingestion can result in damage to the following organs/biological systems: liver, muscles, skeletal.
ASPIRATION HAZARD : …………………………………………………………… Not classified. Does not meet classification criteria.
OTHER HEALTH HAZARD INFORMATON : ………………………………… This product is corrosive to skin and mucous membrane tissues. As a result
of this identified hazard, it is anticipated that excessive inhalation of vapors may also cause irritation to the respiratory tract.
12. ECOLOGICAL INFORMATION
ACUTE AQUATIC TOXICITY :……………………………………………………. No specific test data available for the mixture. Calculated
Estimate: Aquatic Acute Category 3. Harmful to aquatic life. Avoid release to the environment.
CHRONIC AQUATIC TO XICITY: ……………………………………………….. No specific test data available for the mixture. Calculated
Estimate: Aquatic Chronic Category 2. Toxic to aquatic life with long lasting effects. Avoid release to the environment.
PERSISTANCE AND BIODEGRADABILITY : ………………………………. No specific test data available for the mixture.
MOBILITY IN SOIL: …………………………………………………………………. No specific test data available for the mixture.
ADDITIONAL ECOTOXICITY INFORMATION : …………………………….. In the liquid, uncured state, this product may be harmful to
aquatic life with long lasting effects. Prevent release to the environment, sewers and natural waters.
Ingredient CAS# Ecotoxicity Classification Information
PRO-SET
HTP-280 Hardener
Page 5 of 6 Last Revised: 03JAN22
Isophoronediamine 2855-13-2 Acute Aquatic Cat. 3; Chronic Aquatic Cat. 3
Methylenebiscyclohexanamine, 4,4 – 1761-71-3 Acute Aquatic Cat. 2; Chronic Aquatic Cat. 2
2-ethyl-4-methylimidazole 931-36-2 Acute Aquatic Cat. 3; Chronic Aquatic Cat. 3
4-Methylimidazole 822-36-6 Not classified
13. DISPOSAL CONSIDERATIONS
WASTE DISPOSAL METHOD: ………………………………………………….. Evaluation of this product using RCRA criteria shows that it is not a
hazardous waste, either by listing or characteristics, in its purchased form. It is the responsibility of the user to determine proper disposal
methods.
Incinerate, recycle (fuel blending) or reclaim may be preferred methods when conducted in accordance with federal, state and local regulations.
14. TRANSPORTATION INFORMATION
US DOT
UN NUMBER: …………………………………………………………………………. UN 2735
SHIPPING NAME: ……………………………………………………………………. Polyamines, liquid, corrosive, n.o.s.
TECHNICAL SHIPPING NAME: …………………………………………………. Methylenebiscyclohexanamine, 4,4 –
HAZARD CLASS: …………………………………………………………………….. Class 8
PACKING GROUP: ………………………………………………………………….. PG II
MARINE POLLUTANT: …………………………………………………………….. No
CANADA TDG
UN NUMBER: …………………………………………………………………………. UN 2735
SHIPPING NAME: ……………………………………………………………………. Polyamines, liquid, corrosive, n.o.s.
TECHNICAL SHIPPING NAME: …………………………………………………. Methylenebiscyclohexanamine, 4,4 –
HAZARD CLASS: …………………………………………………………………….. Class 8
PACKING GROUP: ………………………………………………………………….. PG II
MARINE POLLUTANT: …………………………………………………………….. No
IMDG
UN NUMBER: …………………………………………………………………………. UN 2735
SHIPPING NAME: ……………………………………………………………………. Polyamines, liquid, corrosive, n.o.s.
TECHNICAL SHIPPING NAME: …………………………………………………. Methylenebiscyclohexanamine, 4,4 –
HAZARD CLASS: …………………………………………………………………….. Class 8
PACKING GROUP: ………………………………………………………………….. PG II
EmS Number: ………………………………………………………………………… F-A, S-B
MARINE POLLUTANT ……………………………………………………………… Yes
ICAO/IATA
UN NUMBER: …………………………………………………………………………. UN 2735
SHIPPING NAME: ……………………………………………………………………. Polyamines, liquid, corrosive, n.o.s.
TECHNICAL SHIPPING NAME: …………………………………………………. Methylenebiscyclohexanamine, 4,4 –
HAZARD CLASS: …………………………………………………………………….. Class 8
PACKING GROUP: ………………………………………………………………….. PG II
MARINE POLLUTANT: …………………………………………………………….. Yes
15. REGULATORY INFORMATION
COUNTRY INVENTORY LIST STATUS
United States TSCA All ingredients are listed or otherwise compliant.
Europe EINECS or ELINCS All ingredients are listed or otherwise compliant.
Canada CEPA (DSL/NDSL) CAS# 822-36-6 is on NDSL only. All other ingredients are DSL listed.
Australia AICS All ingredients are listed or otherwise compliant.
Japan ENCS All ingredients are listed or otherwise compliant.
South Korea KECI All ingredients are listed or otherwise compliant.
China IECSC All ingredients are listed or otherwise compliant.
Philippines PICCS All ingredients are listed or otherwise compliant.
US EPA TSCA Requirements: ………………………………………………….. No data available.
Canada WHMIS Confidential Business Information (CBI): ………….. No data available.
US EPA SARA TITTLE III Reporting and Notification Requirements:
Subject to Section 302 (TPQ) ……………………………………………… No data available.
Subject to Section 304 (RQ) ……………………………………………….. No data available.
Subject to Section 311 or 312 …………………………………………….. Refer to health and physical classifications in Section 2.
Subject to Section 313 ………………………………………………………. No data available.
US STATE REGULATORY INFORMATION:
The following chemicals may be specifically regulated by individual states. For details on state regulatory requirements you should contact the
appropriate state agency.
PRO-SET
HTP-280 Hardener
Page 6 of 6 Last Revised: 03JAN22
COMPONENT NAME
/CAS NUMBER STATE CODE
4-Methylimidazole
822-36-6
1
CA
1.
These substances are known to the state of California to cause cancer or reproductive harm, or both.
16. OTHER INFORMATION
REASON FOR ISSUE:……………………………………………………………… Updates to sections 1, 15 and 16.
SDS CONTACT: ……………………………………………………………………… safety@gougeon.com
TITLE: …………………………………………………………………………………… Health, Safety & Environmental Manager
APPROVAL DATE: …………………………………………………………………. January 03, 2022
SUPERSEDES DATE: ……………………………………………………………… January 15, 2019
SDS VERSION: ………………………………………………………………………. HTP-280-2022a
OTHER HAZARD INFORMATION AND RATING SYSTEMS:
HMIS RATING NFPA 704 CODES
HEALTH: 3
FLAMMABILITY: 1
PHYSICAL HAZARD: 0
PERSONAL PROTECTION:
Approximate HMIS and NFPA Risk Ratings Legend:
0 = Low or None; 1 = Slight; 2 = Moderate; 3 = Serious; 4 = Severe
Information in this document is furnished without warranty, expressed or implied, except that it is accurate to the best knowledge of Gougeon Brothers,
Inc. The data on this sheet is related only to the specific material designated herein. Gougeon Brothers, Inc. assumes no legal responsibility for use or
reliance upon these data.
3 0
1
by | Sep 27, 2025
SAFETY DATA SHEET
Last Revised: 03JAN22
1. CHEMICAL PRODUCT AND COMPANY IDENTIFICATION
PRODUCT NAME: ……………………………………… PRO-SET
HTP-280 Hardener
APPLICABLE PRODUCT CODES: ………………. HTP-280, HTP-280-1, HTP-280-2, HTP-280-3, HTP-280-4, HTP-280-5
CHEMICAL FAMILY: ………………………………….. Polyamine-imidazole mixture.
INTENDED PRODUCT USES: ……………………… Curing agent for epoxy resins.
PRODUCT RESTRICTIONS: ……………………….. None identified.
SDS VERSION: …………………………………………. HTP-280-2022a
MANUFACTURER: EMERGENCY TELEPHONE NUMBERS (24 HRS):
Gougeon Brothers, Inc. Transportation
100 Patterson Ave. CHEMTREC: ……………….. 800-424-9300 (U.S.)
Bay City, MI 48706, U.S.A. 703-527-3887 (International)
Phone: 888-377-6738 or 989-684-7286 Non-transportation
www.prosetepoxy.com Poison Hotline: …………….. 800-222-1222
2. HAZARDS IDENTIFICATION
Classification of Substance or Mixture
Acute toxicity, Oral, Category 4
Skin corrosion/irritation, Category 1B
Skin sensitizer, Category 1
Eye damage/irritation, Category 1
Carcinogenicity, Category 2
Specific target organ toxicity (repeated exposure – oral), Category 2
Acute aquatic toxicity, Category 3
Chronic aquatic toxicity, Category 2
Label Elements
Hazard Pictogram(s):
Signal Word:
DANGER
Hazard Statements:
H302 Harmful if swallowed
H314 Causes severe skin burns and eye damage
H317 May cause an allergic skin reaction
H351 Suspected of causing cancer
H372 May cause damage to organs through prolonged or repeated exposure if swallowed
H411 Toxic to aquatic life with long lasting effects
Precautionary Statements:
Prevention
P201 Obtain special instructions before use
P202 Do not handle until all safety precautions have been read and understood
P260 Do not breathe dust/fume/gas/mist/vapors/spray
P264 Wash hands thoroughly after handling
P270 Do not eat, drink or smoke when using this product
P272 Contaminated work clothing should not be allowed out of the workplace
P273 Avoid release to the environment
P280 Wear protective gloves/protective clothing/eye protection/face protection
Response
P301 + P330 + 331 IF SWALLOWED: Rinse mouth. Do NOT induce vomiting.
P303 + P361 + P353 IF ON SKIN (or hair): Take off immediately all contaminated clothing. Rinse or wash skin with soap and water (or
shower).
P304 + P340 IF INHALED: Remove person to fresh air and keep comfortable for breathing
P305 + P351 + P338 + P310 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do.
Continue rinsing.
P308 + P313 IF exposed or concerned: Get medical attention/advice
P310 Immediately call POISON CENTER or doctor.
P333 + P313 If irritation or rash occurs: Get medical attention/advice
P362 + P364 Take of contaminated clothing and wash it before reuse
PRO-SET
HTP-280 Hardener
Page 2 of 6 Last Revised: 03JAN22
P391 Collect spillage
Storage
P405 Store locked up.
Disposal
P501 Dispose of contents and container according to local, state, national and International regulations
Other Hazards
None known.
3. COMPOSITION/INFORMATION ON HAZARDOUS INGREDIENTS
INGREDIENT NAME CAS # CONCENTRATION (%)
Isophoronediamine 2855-13-2 45-70
Methylenebiscyclohexanamine, 4,4 – 1761-71-3 30-60
2-ethyl-4-methylimidazole 931-36-2 1-5
4-Methylimidazole 822-36-6 0.1-1.0
The exact chemical identity and/or exact percentage (concentration) of each ingredient may be held as confidential business information
(CBI). Any ingredient not disclosed in this section may have been determined not to be hazardous to health or the environment, or it may
be present at a level below its disclosure threshold.
4. FIRST AID MEASURES
FIRST AID FOR EYES ……………………………………………………………… SYMPTOMS: Causes eye burns and eye damage. RESPONSE: Flush
immediately with water for at least 15 minutes. Remove contact lenses if present and easy to do. Immediately call a POISON CONTROL CENTER
or doctor.
FIRST AID FOR SKIN ………………………………………………………………. SYMPTOMS: Causes skin burns, redness and irritation. May cause allergic
skin reaction and sensitization. RESPONSE: Immediately wash skin with soap and water. Immediately call a POISON CONTROL CENTER or
doctor.
FIRST AID FOR INHALATION…………………………………………………… SYMPTOMS: Can cause respiratory irritation, shortness of breath or cough.
RESPONSE: Remove to fresh air if effects occur and keep comfortable for breathing. Seek medical attention if symptoms persist or you feel
unwell.
FIRST AID FOR INGESTION …………………………………………………….. SYMPTOMS: May cause gastrointestinal irritation or ulceration. May
cause burns of the mouth and throat. RESPONSE: Rinse mouth with water. DO NOT induce vomiting. If vomiting should occur, keep airway
clear. Immediately call POISON CONTROL CENTER or doctor.
5. FIRE FIGHTING MEASURES
EXTINGUISHING MEDIA: ………………………………………………………… SUITABLE: Foam, carbon dioxide (CO2), dry chemical. NON-SUITABLE:
Direct water stream.
FIRE AND EXPLOSION HAZARDS: ………………………………………….. During a fire, smoke may contain the original materials in addition to
combustion products of varying composition which may be toxic and/or irritating. Combustion products may include, but are not limited to: oxides
of nitrogen, carbon monoxide, carbon dioxide, volatile amines, ammonia, nitric acid, nitrosamines. When mixed with sawdust, wood chips, or
other cellulosic material, spontaneous combustion can occur under certain conditions. Heat is generated as the air oxidizes the amine. If the heat
is not dissipated quickly enough, it can ignite the sawdust.
SPECIAL FIRE FIGHTING PROCEDURES: ………………………………… Use full-body protective gear and a self-contained breathing apparatus.
Use of water may generate toxic aqueous solutions. Do not allow water run-off from fighting fire to enter drains or other water courses.
6. ACCIDENTAL RELEASE MEASURES
EMERGENCY PROCEDURES : …………………………………………………. Keep unnecessary and unprotected personnel from entering area. Use
appropriate safety and personal protective equipment as indicated in Section 8.
MITIGATION AND CLEAN UP PROCEDURES: …………………………… Stop leak without additional risk. Isolate area. Dike and absorb with inert
material (e.g., sand) and collect in a suitable, closed container. Do not use sawdust, wood chips or other cellulosic materials to absorb the spill, as
the possibility for spontaneous combustion exists. Warm, soapy water may be used to clean residual.
ENVIRONMENTAL PRECAUTIONS: ………………………………………….. Prevent from entering into soil, ditches, sewers, waterways and
groundwater. See Section 12 for environmental impact information.
7. HANDLING AND STORAGE
STORAGE TEMPERATURE (min./max.): …………………………………… 40 F (4 C) / 90 F (32 C).
PRO-SET
HTP-280 Hardener
Page 3 of 6 Last Revised: 03JAN22
STORAGE: …………………………………………………………………………….. Store in cool, dry place away from high temperatures and moisture. Keep
container tightly closed. Store in a secure location with restricted access or store locked up.
HANDLING PRECAUTIONS: ……………………………………………………. Use with adequate ventilation. Do not breathe vapors or mists from heated
material. Avoid exposure to concentrated vapors. Avoid skin and eye contact. Wash thoroughly after handling. When mixed with epoxy resin
this product causes an exothermic reaction, which in large masses, can produce enough heat to damage or ignite surrounding materials and emit
fumes and vapors that vary widely in composition and toxicity. Do not breathe vapors or fumes from uncontrolled exotherming masses.
8. EXPOSURE CONTROLS/PERSONAL PROTECTION
ENGINEERING CONTROLS : ……………………………………………………. Use with adequate general ventilation and/or local ventilation to keep
exposures below established limits.
EYE PROTECTION GUIDELINES: …………………………………………….. Chemical splash-proof goggles or face shield.
SKIN PROTECTION GUIDELINES: ……………………………………………. Wear liquid-proof, chemical resistant gloves (nitrile-butyl rubber, neoprene,
butyl rubber or natural rubber) and full body-covering clothing.
RESPIRATORY PROTECTION GUIDELINES: …………………………….. When ventilation cannot be made adequate enough to keep exposures
below established limits, use a NIOSH approved respirator with an organic vapor cartridge, organic vapor cartridge + P100, or a multi-contaminant
cartridge, depending on specific workplace conditions. Consult with your respirator and cartridge supplier to ensure proper selection of respirator
and cartridge based on ingredients listed in Section 3 and specific workplace conditions. Use and select a respirator according the guidelines
established in OSHA 1910.134 or other applicable respiratory protection standard.
ADDITIONAL PROTECTIVE MEASURES: ………………………………….. Use where there is immediate access to safety shower and emergency eye
wash. Wash thoroughly after use. Contact lens should not be worn when working with this material. Generally speaking, working cleanly and
following basic precautionary measures will greatly minimize the potential for harmful exposure to this product under normal use conditions.
OCCUPATIONAL EXPOSURE LIMITS: ……………………………………… Exposure limits may not be established for this product as a whole. For
established exposure limits of specific ingredients in this product, or other available exposure limit information, refer to the table below.
Ingredient Name CAS# Exposure Limit Information
Isophoronediamine 2855-13-2 No data available
Methylenebiscyclohexanamine, 4,4 – 1761-71-3 No data available
2-ethyl-4-methylimidazole 931-36-2 No data available
4-Methylimidazole 822-36-6 No data available
9. PHYSICAL AND CHEMICAL PROPERTIES
PHYSICAL FORM: ………………………………………………………………….. Liquid.
COLOR: ………………………………………………………………………………… Slight amber
ODOR: …………………………………………………………………………………… Ammonia-like
ODOR THRESHOLD: ………………………………………………………………. No data available
pH …………………………………………………………………………………………. 11.74
MELTING POINT / FREEZING POINT ………………………………………… No data.
BOILING POINT (760mm/Hg): ………………………………………………….. > 400 F (204 C) estimated based on similar product.
FLASH POINT: ……………………………………………………………………….. Estimated > 200
F (93 C) estimated based similar product.
AUTO IGNITION TEMPERATURE ……………………………………………… No data.
LOWER EXPLOSIVE LIMIT (LEL) ……………………………………………… No data.
UPPER EXPLOSIVE LIMIT (UEL) ……………………………………………… No data.
VAPOR PRESSURE ………………………………………………………………… < 1 mmHg @ 20 C (estimated based on ingredient data).
SPECIFIC GRAVITY/DENSITY (water = 1)......................................... 0.94
BULK DENSITY.................................................................................. 7.85 lbs./gal. (0.94kg/L)
VAPOR DENSITY (air = 1) ................................................................. No data.
EVAPORATIOIN RATE (Butyl Acetate = 1) ....................................... No data.
WATER SOLUBILITY (% BY WT.) ..................................................... No data.
PARTITION COEFFICIENT, n-OCTANOL/WATER (log Pow) ............ No data.
KINEMATIC VISCOSITY: ................................................................... 36.1 (mm
2
/s @ 20
C)
DECOMPOSITION TEMPERATURE : ................................................. No data available.
% VOLATILE BY WEIGHT: ................................................................ ASTM 2369-07 was used to determine the Volatile Matter Content of mixed
epoxy resin and hardener. The combined VOC content for the resin and hardener system is listed below.
VOC Content
Resin/Hardener (g/L) (lb/gal)
HTP-180 / HTP-280 .................................................................... 1.28 0.01
10. STABILITY AND REACTIVITY
STABILITY: ........................................................................................ Product is stable at normal temperatures and pressures.
REACTIVITY / HAZARDOUS REACTIONS: ....................................... Product will not react by itself. A mass of more than one pound of product
plus an epoxy resin will cause irreversible polymerization with significant heat buildup and pressure.
PRO-SET
HTP-280 Hardener
Page 4 of 6 Last Revised: 03JAN22
INCOMPATIBILITIES: ........................................................................ Avoid organic and mineral acids, oxidizing materials, halogenated organic
compounds (e.g., methylene chloride), nitrosating agents, sodium hyprochlorite. External heating or self-heating could result in rapid temperature
increase and pressure build up. If such a condition were to occur in a drum, the drum could expand and rupture violently.
CONDITIONS TO AVOID: .................................................................. Avoid excessive heat.
DECOMPOSITION PRODUCTS: ........................................................ Very toxic fumes and gases when burned or otherwise heated to
decomposition. Decomposition products may include, but not limited to: oxides of nitrogen, volatile amines, ammonia, nitric acid, nitrosamines.
11. TOXICOLOGICAL INFORMATION
Ingredient Name CAS# LD50 Oral LD50 Dermal LC50 Inhalation
Isophoronediamine 2855-13-2 1030 mg/kg >2000 >5.01 mg/l 4h mist
Methylenebiscyclohexanamine, 4,4 – 1761-71-3 380 mg/kg >1000 No data
2-ethyl-4-methylimidazole 931-36-2 731-1000 mg/kg >400 mg/kg No data
4-Methylimidazole 822-36-6 350-751 mg/kg 440 mg/kg No data
Note: Results in this table were derived using the appropriate rat and rabbit species unless otherwise noted.
ACUTE TOXICITY: ………………………………………………………………….. No specific toxicity data exists for this mixture. Classification is
based on acute toxicity estimation methods using ingredient data.
Oral: ……………………………………………………………………….. Category 4. Harmful if swallowed . May cause gastrointestinal
irritation or ulceration. May cause burns of the mouth and throat.
Dermal: …………………………………………………………………… Not classified. Does not meet classification criteria.
Inhalation:………………………………………………………………… Not classified. Does not meet classification criteria.
SKIN CORROSION / IRRITATION: …………………………………………….. Category 1B. Causes severe skin burns. Effects may be
immediate. May cause persistent irritation or dermatitis.
SERIOUS EYE DAMAGE / IRRITATION:…………………………………….. Category 1. Causes serious eye damage. May cause blurred
vision. May cause corneal damage resulting in vision impairment or even blindness.
RESPIRATORY SENSITIZATION : ……………………………………………… No data available.
SKIN SENSITIZATION:…………………………………………………………….. Category 1. May cause allergic skin reaction..
REPRODUCTIVE TOXICITY: …………………………………………………….. Not classified. Does not meet classification criteria.
MUTAGENICITY: …………………………………………………………………….. Not classified. Does not meet classification criteria.
CARCINOGENICITY: ……………………………………………………………….. Category 2. Suspected of causing cancer.
A component in this product, 4-Methyleimidazole, present at less than 0.2%, is suspected of causing cancer and is listed by IARC as a Group 2B
carcinogen. Under the conditions of 2-year NTP feed studies, there was no evidence of carcinogenic activity of 4-Methylimidazole in male rats
exposed to 625, 1,250 and 2,500 ppm. There was equivocal evidence of carcinogenic activity of 4-Methylimidazole in female rats based on
increased incidences of mononuclear cell leukemia. There was clear evidence of carcinogenic activity of 4-Methylimidazole in male and female
mice based on increased incidences of alveolar/bronchiolar neoplasms.
SPECIFIC TARGET ORGAN TOXICITY (Single Exposure): ………….. Not classified. Does not meet classification criteria.
SPECIFIC TARGET ORGAN TOXICITY (Repeated Exposure): …….. STOT RE Category 2. May cause damage to organs through prolonged or
repeated exposure if swallowed. Repeated ingestion can result in damage to the following organs/biological systems: liver, muscles, skeletal.
ASPIRATION HAZARD : …………………………………………………………… Not classified. Does not meet classification criteria.
OTHER HEALTH HAZARD INFORMATON : ………………………………… This product is corrosive to skin and mucous membrane tissues. As a result
of this identified hazard, it is anticipated that excessive inhalation of vapors may also cause irritation to the respiratory tract.
12. ECOLOGICAL INFORMATION
ACUTE AQUATIC TOXICITY :……………………………………………………. No specific test data available for the mixture. Calculated
Estimate: Aquatic Acute Category 3. Harmful to aquatic life. Avoid release to the environment.
CHRONIC AQUATIC TO XICITY: ……………………………………………….. No specific test data available for the mixture. Calculated
Estimate: Aquatic Chronic Category 2. Toxic to aquatic life with long lasting effects. Avoid release to the environment.
PERSISTANCE AND BIODEGRADABILITY : ………………………………. No specific test data available for the mixture.
MOBILITY IN SOIL: …………………………………………………………………. No specific test data available for the mixture.
ADDITIONAL ECOTOXICITY INFORMATION : …………………………….. In the liquid, uncured state, this product may be harmful to
aquatic life with long lasting effects. Prevent release to the environment, sewers and natural waters.
Ingredient CAS# Ecotoxicity Classification Information
PRO-SET
HTP-280 Hardener
Page 5 of 6 Last Revised: 03JAN22
Isophoronediamine 2855-13-2 Acute Aquatic Cat. 3; Chronic Aquatic Cat. 3
Methylenebiscyclohexanamine, 4,4 – 1761-71-3 Acute Aquatic Cat. 2; Chronic Aquatic Cat. 2
2-ethyl-4-methylimidazole 931-36-2 Acute Aquatic Cat. 3; Chronic Aquatic Cat. 3
4-Methylimidazole 822-36-6 Not classified
13. DISPOSAL CONSIDERATIONS
WASTE DISPOSAL METHOD: ………………………………………………….. Evaluation of this product using RCRA criteria shows that it is not a
hazardous waste, either by listing or characteristics, in its purchased form. It is the responsibility of the user to determine proper disposal
methods.
Incinerate, recycle (fuel blending) or reclaim may be preferred methods when conducted in accordance with federal, state and local regulations.
14. TRANSPORTATION INFORMATION
US DOT
UN NUMBER: …………………………………………………………………………. UN 2735
SHIPPING NAME: ……………………………………………………………………. Polyamines, liquid, corrosive, n.o.s.
TECHNICAL SHIPPING NAME: …………………………………………………. Methylenebiscyclohexanamine, 4,4 –
HAZARD CLASS: …………………………………………………………………….. Class 8
PACKING GROUP: ………………………………………………………………….. PG II
MARINE POLLUTANT: …………………………………………………………….. No
CANADA TDG
UN NUMBER: …………………………………………………………………………. UN 2735
SHIPPING NAME: ……………………………………………………………………. Polyamines, liquid, corrosive, n.o.s.
TECHNICAL SHIPPING NAME: …………………………………………………. Methylenebiscyclohexanamine, 4,4 –
HAZARD CLASS: …………………………………………………………………….. Class 8
PACKING GROUP: ………………………………………………………………….. PG II
MARINE POLLUTANT: …………………………………………………………….. No
IMDG
UN NUMBER: …………………………………………………………………………. UN 2735
SHIPPING NAME: ……………………………………………………………………. Polyamines, liquid, corrosive, n.o.s.
TECHNICAL SHIPPING NAME: …………………………………………………. Methylenebiscyclohexanamine, 4,4 –
HAZARD CLASS: …………………………………………………………………….. Class 8
PACKING GROUP: ………………………………………………………………….. PG II
EmS Number: ………………………………………………………………………… F-A, S-B
MARINE POLLUTANT ……………………………………………………………… Yes
ICAO/IATA
UN NUMBER: …………………………………………………………………………. UN 2735
SHIPPING NAME: ……………………………………………………………………. Polyamines, liquid, corrosive, n.o.s.
TECHNICAL SHIPPING NAME: …………………………………………………. Methylenebiscyclohexanamine, 4,4 –
HAZARD CLASS: …………………………………………………………………….. Class 8
PACKING GROUP: ………………………………………………………………….. PG II
MARINE POLLUTANT: …………………………………………………………….. Yes
15. REGULATORY INFORMATION
COUNTRY INVENTORY LIST STATUS
United States TSCA All ingredients are listed or otherwise compliant.
Europe EINECS or ELINCS All ingredients are listed or otherwise compliant.
Canada CEPA (DSL/NDSL) CAS# 822-36-6 is on NDSL only. All other ingredients are DSL listed.
Australia AICS All ingredients are listed or otherwise compliant.
Japan ENCS All ingredients are listed or otherwise compliant.
South Korea KECI All ingredients are listed or otherwise compliant.
China IECSC All ingredients are listed or otherwise compliant.
Philippines PICCS All ingredients are listed or otherwise compliant.
US EPA TSCA Requirements: ………………………………………………….. No data available.
Canada WHMIS Confidential Business Information (CBI): ………….. No data available.
US EPA SARA TITTLE III Reporting and Notification Requirements:
Subject to Section 302 (TPQ) ……………………………………………… No data available.
Subject to Section 304 (RQ) ……………………………………………….. No data available.
Subject to Section 311 or 312 …………………………………………….. Refer to health and physical classifications in Section 2.
Subject to Section 313 ………………………………………………………. No data available.
US STATE REGULATORY INFORMATION:
The following chemicals may be specifically regulated by individual states. For details on state regulatory requirements you should contact the
appropriate state agency.
PRO-SET
HTP-280 Hardener
Page 6 of 6 Last Revised: 03JAN22
COMPONENT NAME
/CAS NUMBER STATE CODE
4-Methylimidazole
822-36-6
1
CA
1.
These substances are known to the state of California to cause cancer or reproductive harm, or both.
16. OTHER INFORMATION
REASON FOR ISSUE:……………………………………………………………… Updates to sections 1, 15 and 16.
SDS CONTACT: ……………………………………………………………………… safety@gougeon.com
TITLE: …………………………………………………………………………………… Health, Safety & Environmental Manager
APPROVAL DATE: …………………………………………………………………. January 03, 2022
SUPERSEDES DATE: ……………………………………………………………… January 15, 2019
SDS VERSION: ………………………………………………………………………. HTP-280-2022a
OTHER HAZARD INFORMATION AND RATING SYSTEMS:
HMIS RATING NFPA 704 CODES
HEALTH: 3
FLAMMABILITY: 1
PHYSICAL HAZARD: 0
PERSONAL PROTECTION:
Approximate HMIS and NFPA Risk Ratings Legend:
0 = Low or None; 1 = Slight; 2 = Moderate; 3 = Serious; 4 = Severe
Information in this document is furnished without warranty, expressed or implied, except that it is accurate to the best knowledge of Gougeon Brothers,
Inc. The data on this sheet is related only to the specific material designated herein. Gougeon Brothers, Inc. assumes no legal responsibility for use or
reliance upon these data.
3 0
1
by | Sep 27, 2025
SAFETY DATA SHEET
Last Revised: 03JAN22
1. CHEMICAL PRODUCT AND COMPANY IDENTIFICATION
PRODUCT NAME: ……………………………………… PRO-SET
HTP-280 Hardener
APPLICABLE PRODUCT CODES: ………………. HTP-280, HTP-280-1, HTP-280-2, HTP-280-3, HTP-280-4, HTP-280-5
CHEMICAL FAMILY: ………………………………….. Polyamine-imidazole mixture.
INTENDED PRODUCT USES: ……………………… Curing agent for epoxy resins.
PRODUCT RESTRICTIONS: ……………………….. None identified.
SDS VERSION: …………………………………………. HTP-280-2022a
MANUFACTURER: EMERGENCY TELEPHONE NUMBERS (24 HRS):
Gougeon Brothers, Inc. Transportation
100 Patterson Ave. CHEMTREC: ……………….. 800-424-9300 (U.S.)
Bay City, MI 48706, U.S.A. 703-527-3887 (International)
Phone: 888-377-6738 or 989-684-7286 Non-transportation
www.prosetepoxy.com Poison Hotline: …………….. 800-222-1222
2. HAZARDS IDENTIFICATION
Classification of Substance or Mixture
Acute toxicity, Oral, Category 4
Skin corrosion/irritation, Category 1B
Skin sensitizer, Category 1
Eye damage/irritation, Category 1
Carcinogenicity, Category 2
Specific target organ toxicity (repeated exposure – oral), Category 2
Acute aquatic toxicity, Category 3
Chronic aquatic toxicity, Category 2
Label Elements
Hazard Pictogram(s):
Signal Word:
DANGER
Hazard Statements:
H302 Harmful if swallowed
H314 Causes severe skin burns and eye damage
H317 May cause an allergic skin reaction
H351 Suspected of causing cancer
H372 May cause damage to organs through prolonged or repeated exposure if swallowed
H411 Toxic to aquatic life with long lasting effects
Precautionary Statements:
Prevention
P201 Obtain special instructions before use
P202 Do not handle until all safety precautions have been read and understood
P260 Do not breathe dust/fume/gas/mist/vapors/spray
P264 Wash hands thoroughly after handling
P270 Do not eat, drink or smoke when using this product
P272 Contaminated work clothing should not be allowed out of the workplace
P273 Avoid release to the environment
P280 Wear protective gloves/protective clothing/eye protection/face protection
Response
P301 + P330 + 331 IF SWALLOWED: Rinse mouth. Do NOT induce vomiting.
P303 + P361 + P353 IF ON SKIN (or hair): Take off immediately all contaminated clothing. Rinse or wash skin with soap and water (or
shower).
P304 + P340 IF INHALED: Remove person to fresh air and keep comfortable for breathing
P305 + P351 + P338 + P310 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do.
Continue rinsing.
P308 + P313 IF exposed or concerned: Get medical attention/advice
P310 Immediately call POISON CENTER or doctor.
P333 + P313 If irritation or rash occurs: Get medical attention/advice
P362 + P364 Take of contaminated clothing and wash it before reuse
PRO-SET
HTP-280 Hardener
Page 2 of 6 Last Revised: 03JAN22
P391 Collect spillage
Storage
P405 Store locked up.
Disposal
P501 Dispose of contents and container according to local, state, national and International regulations
Other Hazards
None known.
3. COMPOSITION/INFORMATION ON HAZARDOUS INGREDIENTS
INGREDIENT NAME CAS # CONCENTRATION (%)
Isophoronediamine 2855-13-2 45-70
Methylenebiscyclohexanamine, 4,4 – 1761-71-3 30-60
2-ethyl-4-methylimidazole 931-36-2 1-5
4-Methylimidazole 822-36-6 0.1-1.0
The exact chemical identity and/or exact percentage (concentration) of each ingredient may be held as confidential business information
(CBI). Any ingredient not disclosed in this section may have been determined not to be hazardous to health or the environment, or it may
be present at a level below its disclosure threshold.
4. FIRST AID MEASURES
FIRST AID FOR EYES ……………………………………………………………… SYMPTOMS: Causes eye burns and eye damage. RESPONSE: Flush
immediately with water for at least 15 minutes. Remove contact lenses if present and easy to do. Immediately call a POISON CONTROL CENTER
or doctor.
FIRST AID FOR SKIN ………………………………………………………………. SYMPTOMS: Causes skin burns, redness and irritation. May cause allergic
skin reaction and sensitization. RESPONSE: Immediately wash skin with soap and water. Immediately call a POISON CONTROL CENTER or
doctor.
FIRST AID FOR INHALATION…………………………………………………… SYMPTOMS: Can cause respiratory irritation, shortness of breath or cough.
RESPONSE: Remove to fresh air if effects occur and keep comfortable for breathing. Seek medical attention if symptoms persist or you feel
unwell.
FIRST AID FOR INGESTION …………………………………………………….. SYMPTOMS: May cause gastrointestinal irritation or ulceration. May
cause burns of the mouth and throat. RESPONSE: Rinse mouth with water. DO NOT induce vomiting. If vomiting should occur, keep airway
clear. Immediately call POISON CONTROL CENTER or doctor.
5. FIRE FIGHTING MEASURES
EXTINGUISHING MEDIA: ………………………………………………………… SUITABLE: Foam, carbon dioxide (CO2), dry chemical. NON-SUITABLE:
Direct water stream.
FIRE AND EXPLOSION HAZARDS: ………………………………………….. During a fire, smoke may contain the original materials in addition to
combustion products of varying composition which may be toxic and/or irritating. Combustion products may include, but are not limited to: oxides
of nitrogen, carbon monoxide, carbon dioxide, volatile amines, ammonia, nitric acid, nitrosamines. When mixed with sawdust, wood chips, or
other cellulosic material, spontaneous combustion can occur under certain conditions. Heat is generated as the air oxidizes the amine. If the heat
is not dissipated quickly enough, it can ignite the sawdust.
SPECIAL FIRE FIGHTING PROCEDURES: ………………………………… Use full-body protective gear and a self-contained breathing apparatus.
Use of water may generate toxic aqueous solutions. Do not allow water run-off from fighting fire to enter drains or other water courses.
6. ACCIDENTAL RELEASE MEASURES
EMERGENCY PROCEDURES : …………………………………………………. Keep unnecessary and unprotected personnel from entering area. Use
appropriate safety and personal protective equipment as indicated in Section 8.
MITIGATION AND CLEAN UP PROCEDURES: …………………………… Stop leak without additional risk. Isolate area. Dike and absorb with inert
material (e.g., sand) and collect in a suitable, closed container. Do not use sawdust, wood chips or other cellulosic materials to absorb the spill, as
the possibility for spontaneous combustion exists. Warm, soapy water may be used to clean residual.
ENVIRONMENTAL PRECAUTIONS: ………………………………………….. Prevent from entering into soil, ditches, sewers, waterways and
groundwater. See Section 12 for environmental impact information.
7. HANDLING AND STORAGE
STORAGE TEMPERATURE (min./max.): …………………………………… 40 F (4 C) / 90 F (32 C).
PRO-SET
HTP-280 Hardener
Page 3 of 6 Last Revised: 03JAN22
STORAGE: …………………………………………………………………………….. Store in cool, dry place away from high temperatures and moisture. Keep
container tightly closed. Store in a secure location with restricted access or store locked up.
HANDLING PRECAUTIONS: ……………………………………………………. Use with adequate ventilation. Do not breathe vapors or mists from heated
material. Avoid exposure to concentrated vapors. Avoid skin and eye contact. Wash thoroughly after handling. When mixed with epoxy resin
this product causes an exothermic reaction, which in large masses, can produce enough heat to damage or ignite surrounding materials and emit
fumes and vapors that vary widely in composition and toxicity. Do not breathe vapors or fumes from uncontrolled exotherming masses.
8. EXPOSURE CONTROLS/PERSONAL PROTECTION
ENGINEERING CONTROLS : ……………………………………………………. Use with adequate general ventilation and/or local ventilation to keep
exposures below established limits.
EYE PROTECTION GUIDELINES: …………………………………………….. Chemical splash-proof goggles or face shield.
SKIN PROTECTION GUIDELINES: ……………………………………………. Wear liquid-proof, chemical resistant gloves (nitrile-butyl rubber, neoprene,
butyl rubber or natural rubber) and full body-covering clothing.
RESPIRATORY PROTECTION GUIDELINES: …………………………….. When ventilation cannot be made adequate enough to keep exposures
below established limits, use a NIOSH approved respirator with an organic vapor cartridge, organic vapor cartridge + P100, or a multi-contaminant
cartridge, depending on specific workplace conditions. Consult with your respirator and cartridge supplier to ensure proper selection of respirator
and cartridge based on ingredients listed in Section 3 and specific workplace conditions. Use and select a respirator according the guidelines
established in OSHA 1910.134 or other applicable respiratory protection standard.
ADDITIONAL PROTECTIVE MEASURES: ………………………………….. Use where there is immediate access to safety shower and emergency eye
wash. Wash thoroughly after use. Contact lens should not be worn when working with this material. Generally speaking, working cleanly and
following basic precautionary measures will greatly minimize the potential for harmful exposure to this product under normal use conditions.
OCCUPATIONAL EXPOSURE LIMITS: ……………………………………… Exposure limits may not be established for this product as a whole. For
established exposure limits of specific ingredients in this product, or other available exposure limit information, refer to the table below.
Ingredient Name CAS# Exposure Limit Information
Isophoronediamine 2855-13-2 No data available
Methylenebiscyclohexanamine, 4,4 – 1761-71-3 No data available
2-ethyl-4-methylimidazole 931-36-2 No data available
4-Methylimidazole 822-36-6 No data available
9. PHYSICAL AND CHEMICAL PROPERTIES
PHYSICAL FORM: ………………………………………………………………….. Liquid.
COLOR: ………………………………………………………………………………… Slight amber
ODOR: …………………………………………………………………………………… Ammonia-like
ODOR THRESHOLD: ………………………………………………………………. No data available
pH …………………………………………………………………………………………. 11.74
MELTING POINT / FREEZING POINT ………………………………………… No data.
BOILING POINT (760mm/Hg): ………………………………………………….. > 400 F (204 C) estimated based on similar product.
FLASH POINT: ……………………………………………………………………….. Estimated > 200
F (93 C) estimated based similar product.
AUTO IGNITION TEMPERATURE ……………………………………………… No data.
LOWER EXPLOSIVE LIMIT (LEL) ……………………………………………… No data.
UPPER EXPLOSIVE LIMIT (UEL) ……………………………………………… No data.
VAPOR PRESSURE ………………………………………………………………… < 1 mmHg @ 20 C (estimated based on ingredient data).
SPECIFIC GRAVITY/DENSITY (water = 1)......................................... 0.94
BULK DENSITY.................................................................................. 7.85 lbs./gal. (0.94kg/L)
VAPOR DENSITY (air = 1) ................................................................. No data.
EVAPORATIOIN RATE (Butyl Acetate = 1) ....................................... No data.
WATER SOLUBILITY (% BY WT.) ..................................................... No data.
PARTITION COEFFICIENT, n-OCTANOL/WATER (log Pow) ............ No data.
KINEMATIC VISCOSITY: ................................................................... 36.1 (mm
2
/s @ 20
C)
DECOMPOSITION TEMPERATURE : ................................................. No data available.
% VOLATILE BY WEIGHT: ................................................................ ASTM 2369-07 was used to determine the Volatile Matter Content of mixed
epoxy resin and hardener. The combined VOC content for the resin and hardener system is listed below.
VOC Content
Resin/Hardener (g/L) (lb/gal)
HTP-180 / HTP-280 .................................................................... 1.28 0.01
10. STABILITY AND REACTIVITY
STABILITY: ........................................................................................ Product is stable at normal temperatures and pressures.
REACTIVITY / HAZARDOUS REACTIONS: ....................................... Product will not react by itself. A mass of more than one pound of product
plus an epoxy resin will cause irreversible polymerization with significant heat buildup and pressure.
PRO-SET
HTP-280 Hardener
Page 4 of 6 Last Revised: 03JAN22
INCOMPATIBILITIES: ........................................................................ Avoid organic and mineral acids, oxidizing materials, halogenated organic
compounds (e.g., methylene chloride), nitrosating agents, sodium hyprochlorite. External heating or self-heating could result in rapid temperature
increase and pressure build up. If such a condition were to occur in a drum, the drum could expand and rupture violently.
CONDITIONS TO AVOID: .................................................................. Avoid excessive heat.
DECOMPOSITION PRODUCTS: ........................................................ Very toxic fumes and gases when burned or otherwise heated to
decomposition. Decomposition products may include, but not limited to: oxides of nitrogen, volatile amines, ammonia, nitric acid, nitrosamines.
11. TOXICOLOGICAL INFORMATION
Ingredient Name CAS# LD50 Oral LD50 Dermal LC50 Inhalation
Isophoronediamine 2855-13-2 1030 mg/kg >2000 >5.01 mg/l 4h mist
Methylenebiscyclohexanamine, 4,4 – 1761-71-3 380 mg/kg >1000 No data
2-ethyl-4-methylimidazole 931-36-2 731-1000 mg/kg >400 mg/kg No data
4-Methylimidazole 822-36-6 350-751 mg/kg 440 mg/kg No data
Note: Results in this table were derived using the appropriate rat and rabbit species unless otherwise noted.
ACUTE TOXICITY: ………………………………………………………………….. No specific toxicity data exists for this mixture. Classification is
based on acute toxicity estimation methods using ingredient data.
Oral: ……………………………………………………………………….. Category 4. Harmful if swallowed . May cause gastrointestinal
irritation or ulceration. May cause burns of the mouth and throat.
Dermal: …………………………………………………………………… Not classified. Does not meet classification criteria.
Inhalation:………………………………………………………………… Not classified. Does not meet classification criteria.
SKIN CORROSION / IRRITATION: …………………………………………….. Category 1B. Causes severe skin burns. Effects may be
immediate. May cause persistent irritation or dermatitis.
SERIOUS EYE DAMAGE / IRRITATION:…………………………………….. Category 1. Causes serious eye damage. May cause blurred
vision. May cause corneal damage resulting in vision impairment or even blindness.
RESPIRATORY SENSITIZATION : ……………………………………………… No data available.
SKIN SENSITIZATION:…………………………………………………………….. Category 1. May cause allergic skin reaction..
REPRODUCTIVE TOXICITY: …………………………………………………….. Not classified. Does not meet classification criteria.
MUTAGENICITY: …………………………………………………………………….. Not classified. Does not meet classification criteria.
CARCINOGENICITY: ……………………………………………………………….. Category 2. Suspected of causing cancer.
A component in this product, 4-Methyleimidazole, present at less than 0.2%, is suspected of causing cancer and is listed by IARC as a Group 2B
carcinogen. Under the conditions of 2-year NTP feed studies, there was no evidence of carcinogenic activity of 4-Methylimidazole in male rats
exposed to 625, 1,250 and 2,500 ppm. There was equivocal evidence of carcinogenic activity of 4-Methylimidazole in female rats based on
increased incidences of mononuclear cell leukemia. There was clear evidence of carcinogenic activity of 4-Methylimidazole in male and female
mice based on increased incidences of alveolar/bronchiolar neoplasms.
SPECIFIC TARGET ORGAN TOXICITY (Single Exposure): ………….. Not classified. Does not meet classification criteria.
SPECIFIC TARGET ORGAN TOXICITY (Repeated Exposure): …….. STOT RE Category 2. May cause damage to organs through prolonged or
repeated exposure if swallowed. Repeated ingestion can result in damage to the following organs/biological systems: liver, muscles, skeletal.
ASPIRATION HAZARD : …………………………………………………………… Not classified. Does not meet classification criteria.
OTHER HEALTH HAZARD INFORMATON : ………………………………… This product is corrosive to skin and mucous membrane tissues. As a result
of this identified hazard, it is anticipated that excessive inhalation of vapors may also cause irritation to the respiratory tract.
12. ECOLOGICAL INFORMATION
ACUTE AQUATIC TOXICITY :……………………………………………………. No specific test data available for the mixture. Calculated
Estimate: Aquatic Acute Category 3. Harmful to aquatic life. Avoid release to the environment.
CHRONIC AQUATIC TO XICITY: ……………………………………………….. No specific test data available for the mixture. Calculated
Estimate: Aquatic Chronic Category 2. Toxic to aquatic life with long lasting effects. Avoid release to the environment.
PERSISTANCE AND BIODEGRADABILITY : ………………………………. No specific test data available for the mixture.
MOBILITY IN SOIL: …………………………………………………………………. No specific test data available for the mixture.
ADDITIONAL ECOTOXICITY INFORMATION : …………………………….. In the liquid, uncured state, this product may be harmful to
aquatic life with long lasting effects. Prevent release to the environment, sewers and natural waters.
Ingredient CAS# Ecotoxicity Classification Information
PRO-SET
HTP-280 Hardener
Page 5 of 6 Last Revised: 03JAN22
Isophoronediamine 2855-13-2 Acute Aquatic Cat. 3; Chronic Aquatic Cat. 3
Methylenebiscyclohexanamine, 4,4 – 1761-71-3 Acute Aquatic Cat. 2; Chronic Aquatic Cat. 2
2-ethyl-4-methylimidazole 931-36-2 Acute Aquatic Cat. 3; Chronic Aquatic Cat. 3
4-Methylimidazole 822-36-6 Not classified
13. DISPOSAL CONSIDERATIONS
WASTE DISPOSAL METHOD: ………………………………………………….. Evaluation of this product using RCRA criteria shows that it is not a
hazardous waste, either by listing or characteristics, in its purchased form. It is the responsibility of the user to determine proper disposal
methods.
Incinerate, recycle (fuel blending) or reclaim may be preferred methods when conducted in accordance with federal, state and local regulations.
14. TRANSPORTATION INFORMATION
US DOT
UN NUMBER: …………………………………………………………………………. UN 2735
SHIPPING NAME: ……………………………………………………………………. Polyamines, liquid, corrosive, n.o.s.
TECHNICAL SHIPPING NAME: …………………………………………………. Methylenebiscyclohexanamine, 4,4 –
HAZARD CLASS: …………………………………………………………………….. Class 8
PACKING GROUP: ………………………………………………………………….. PG II
MARINE POLLUTANT: …………………………………………………………….. No
CANADA TDG
UN NUMBER: …………………………………………………………………………. UN 2735
SHIPPING NAME: ……………………………………………………………………. Polyamines, liquid, corrosive, n.o.s.
TECHNICAL SHIPPING NAME: …………………………………………………. Methylenebiscyclohexanamine, 4,4 –
HAZARD CLASS: …………………………………………………………………….. Class 8
PACKING GROUP: ………………………………………………………………….. PG II
MARINE POLLUTANT: …………………………………………………………….. No
IMDG
UN NUMBER: …………………………………………………………………………. UN 2735
SHIPPING NAME: ……………………………………………………………………. Polyamines, liquid, corrosive, n.o.s.
TECHNICAL SHIPPING NAME: …………………………………………………. Methylenebiscyclohexanamine, 4,4 –
HAZARD CLASS: …………………………………………………………………….. Class 8
PACKING GROUP: ………………………………………………………………….. PG II
EmS Number: ………………………………………………………………………… F-A, S-B
MARINE POLLUTANT ……………………………………………………………… Yes
ICAO/IATA
UN NUMBER: …………………………………………………………………………. UN 2735
SHIPPING NAME: ……………………………………………………………………. Polyamines, liquid, corrosive, n.o.s.
TECHNICAL SHIPPING NAME: …………………………………………………. Methylenebiscyclohexanamine, 4,4 –
HAZARD CLASS: …………………………………………………………………….. Class 8
PACKING GROUP: ………………………………………………………………….. PG II
MARINE POLLUTANT: …………………………………………………………….. Yes
15. REGULATORY INFORMATION
COUNTRY INVENTORY LIST STATUS
United States TSCA All ingredients are listed or otherwise compliant.
Europe EINECS or ELINCS All ingredients are listed or otherwise compliant.
Canada CEPA (DSL/NDSL) CAS# 822-36-6 is on NDSL only. All other ingredients are DSL listed.
Australia AICS All ingredients are listed or otherwise compliant.
Japan ENCS All ingredients are listed or otherwise compliant.
South Korea KECI All ingredients are listed or otherwise compliant.
China IECSC All ingredients are listed or otherwise compliant.
Philippines PICCS All ingredients are listed or otherwise compliant.
US EPA TSCA Requirements: ………………………………………………….. No data available.
Canada WHMIS Confidential Business Information (CBI): ………….. No data available.
US EPA SARA TITTLE III Reporting and Notification Requirements:
Subject to Section 302 (TPQ) ……………………………………………… No data available.
Subject to Section 304 (RQ) ……………………………………………….. No data available.
Subject to Section 311 or 312 …………………………………………….. Refer to health and physical classifications in Section 2.
Subject to Section 313 ………………………………………………………. No data available.
US STATE REGULATORY INFORMATION:
The following chemicals may be specifically regulated by individual states. For details on state regulatory requirements you should contact the
appropriate state agency.
PRO-SET
HTP-280 Hardener
Page 6 of 6 Last Revised: 03JAN22
COMPONENT NAME
/CAS NUMBER STATE CODE
4-Methylimidazole
822-36-6
1
CA
1.
These substances are known to the state of California to cause cancer or reproductive harm, or both.
16. OTHER INFORMATION
REASON FOR ISSUE:……………………………………………………………… Updates to sections 1, 15 and 16.
SDS CONTACT: ……………………………………………………………………… safety@gougeon.com
TITLE: …………………………………………………………………………………… Health, Safety & Environmental Manager
APPROVAL DATE: …………………………………………………………………. January 03, 2022
SUPERSEDES DATE: ……………………………………………………………… January 15, 2019
SDS VERSION: ………………………………………………………………………. HTP-280-2022a
OTHER HAZARD INFORMATION AND RATING SYSTEMS:
HMIS RATING NFPA 704 CODES
HEALTH: 3
FLAMMABILITY: 1
PHYSICAL HAZARD: 0
PERSONAL PROTECTION:
Approximate HMIS and NFPA Risk Ratings Legend:
0 = Low or None; 1 = Slight; 2 = Moderate; 3 = Serious; 4 = Severe
Information in this document is furnished without warranty, expressed or implied, except that it is accurate to the best knowledge of Gougeon Brothers,
Inc. The data on this sheet is related only to the specific material designated herein. Gougeon Brothers, Inc. assumes no legal responsibility for use or
reliance upon these data.
3 0
1
