Trimethylolpropane

1Identification

Name

Trimethylolpropane

IUPAC name

2-ethyl-2-(hydroxymethyl)propane-1,3-diol

CAS number

77-99-6

EC number

201-074-9

Molecular formula

C6H14O3

Molecular weight

134.17 g/mol

InChIKey

ZJCCRDAZUWHFQH-UHFFFAOYSA-N

SMILES

CCC(CO)(CO)CO

PubChem CID

6510

Synonyms

Trimethylolpropane, 2-Ethyl-2-(hydroxymethyl)-1,3-propanediol, 1,1,1-TRIS(HYDROXYMETHYL)PROPANE, Ethriol, Hexaglycerine, Etriol, Ettriol, TMP (alcohol), Propylidynetrimethanol, 1,1,1-Trimethylolpropane, Ethyltrimethylolmethane, 1,3-Propanediol, 2-ethyl-2-(hydroxymethyl)-, Tri(hydroxymethyl)propane, Tris(hydroxymethyl)propane

Recommended uses

• Used to make varnishes, alkyd resins, polyesters, UV cross linking agents, and esters; Also used in synthetic drying oils, urethane foams and coatings, silicone lube oils, lactone plasticizers, textile finishes, surfactants, epoxidation products, and as a cross-linking agent for spandex fibers; [HSDB] Used to make resins in closed systems; [OECD SIDS: Trimethylolpropane]
  Haz-Map, Information on Hazardous Chemicals and Occupational Diseases
• Textiles (Fiber & Fabric Manufacturing) [Category: Industry] Painting (Solvents) [Category: Paint] Textiles (Printing, Dyeing, or Finishing) [Category: Industry]
  Haz-Map, Information on Hazardous Chemicals and Occupational Diseases
• CONDITIONING AGENT; MFR OF VARNISHES, ALKYD RESINS; SYNTHETIC DRYING OILS; URETHANE FOAMS & COATINGS; SILICONE LUBE OILS; LACTONE PLASTICIZERS; TEXTILE FINISHES; SURFACTANTS; EPOXIDATION PRODUCTS
  Hazardous Substances Data Bank (HSDB)
• Not Known or Reasonably Ascertainable Waterproofing agent Plasticizer Hardener Pigment Intermediate Other Lubricating agent Solvent Dispersing agent Polymerization promoter Processing aids not otherwise specified Monomers
  EPA Chemical Data Reporting (CDR)
• Pigment Lubricating agent Solvent Polymerization promoter Monomers Processing aids not otherwise specified
  EPA Chemical Data Reporting (CDR)

Use categories: Plastics -> Polymer Type -> N.a. · Plastics -> Heat stabilisers

Description

• Trimethylolpropane is a primary alcohol.
  ChEBI
• See also: Polyester-7 (monomer of).
  PubChem

2Hazard identification

Signal word

Danger

Pictograms

GHS08

Classification source

NITE-CMC

Precautionary statements

Fire hazards

• Combustible. Finely dispersed particles form explosive mixtures in air.
  ILO-WHO International Chemical Safety Cards (ICSCs)

Hazards summary

• Causes somnolence and respiratory depression in lethal-dose feeding studies of rats and mice; [RTECS] An eye and respiratory tract irritant; [ICSC] May cause irritation; [MSDSonline]
  Haz-Map, Information on Hazardous Chemicals and Occupational Diseases

3Composition / information on ingredients

This page describes the pure substance. Commercial products may be solutions or mixtures. Check Section 3 of your supplier's SDS for concentrations and other ingredients.

4First-aid measures

Not available in the public sources we compile. Check Section 4 of the supplier's SDS.

Symptoms of exposure

• Cough.
  ILO-WHO International Chemical Safety Cards (ICSCs)
• Redness.
  ILO-WHO International Chemical Safety Cards (ICSCs)

5Fire-fighting measures

Not available in the public sources we compile. Check Section 5 of the supplier's SDS.

6Accidental release measures

Spill cleanup

• Personal protection: particulate filter respirator adapted to the airborne concentration of the substance. Sweep spilled substance into covered containers. Wash away remainder with plenty of water.
  ILO-WHO International Chemical Safety Cards (ICSCs)

7Handling and storage

• Separated from strong oxidants. Dry. Well closed.
  ILO-WHO International Chemical Safety Cards (ICSCs)

8Exposure controls / personal protection

No occupational exposure limits found in our sources.

9Physical and chemical properties

10Stability and reactivity

Not available in the public sources we compile. Check Section 10 of the supplier's SDS.

11Toxicological information

Short-term exposure effects

• May cause mechanical irritation to the eyes and respiratory tract.
  ILO-WHO International Chemical Safety Cards (ICSCs)

12Ecological information

Not available in the public sources we compile. Check Section 12 of the supplier's SDS.

13Disposal considerations

Not available in the public sources we compile. Check Section 13 of the supplier's SDS.

14Transport information

Not available in the public sources we compile. Check Section 14 of the supplier's SDS.

How DOT hazard classes work →

15Regulatory information

No specific US regulatory listings found in our sources. Check Section 15 of your supplier's SDS for TSCA, SARA 313, CERCLA, Prop 65 and state listings.

Overview of SDS regulations (OSHA HazCom, WHMIS, REACH/CLP) →

16Other information

Compiled from PubChem CID 6510 and the sources it aggregates (attributed inline). Data retrieved 2026-10-12. This summary describes the pure substance and is not a supplier SDS.