Trimethylolpropane Chemical Properties

Melting point:

56-58 °C(lit.)

Boiling point:

159-161 °C2 mm Hg(lit.)

Density 

1.176

vapor density 

4.8 (vs air)

vapor pressure 

<1 mm Hg ( 20 °C)

refractive index 

1.4850 (estimate)

Flash point:

172 °C

storage temp. 

Store below +30°C.

solubility 

H₂O: 0.1 g/mL, clear

pka

14.01±0.10(Predicted)

form 

Flakes

color 

White

PH

6.5 (100g/l, H2O, 20℃)(External MSDS)

explosive limit

2-11.8%(V)

Water Solubility 

soluble

BRN 

1698309

InChIKey

ZJCCRDAZUWHFQH-UHFFFAOYSA-N

CAS DataBase Reference

77-99-6(CAS DataBase Reference)

NIST Chemistry Reference

1,3-Propanediol, 2-ethyl-2-(hydroxymethyl)-(77-99-6)

EPA Substance Registry System

Trimethylolpropane (77-99-6)

Safety Information

Safety Statements 

22-24/25

WGK Germany 

1

RTECS 

TY6470000

Autoignition Temperature

375 °C DIN 51794

TSCA 

Yes

HS Code 

29054100

Hazardous Substances Data

77-99-6(Hazardous Substances Data)

Toxicity

LD50 orally in Rabbit: > 2500 mg/kg

MSDS

• Language:English Provider:1,1,1-Trimethylolpropane
• Language:English Provider:SigmaAldrich
• Language:English Provider:ACROS
• Language:English Provider:ALFA

Trimethylolpropane Usage And Synthesis

Chemical Properties

Trimethylolpropane is a Colorless, hygroscopic crystals. Soluble in water and alcohol. Combustible.The three primary hydroxyl groups undergo the normal OH group reactions.

Uses

Conditioning agent, manufacture of varnishes, alkyd resins, synthetic drying oils, urethane foams and coatings, silicone lubricant oils, lactone plasticizers, textile finishes, surfactants, epoxidation products.

Uses

Large quantities of trimethylolpropane and its ethoxylated derivatives are used as precursors for urethanes and polyester resins. Another important field of application is in medium-oil and short-oil alkyd resins (→Alkyd Resins). The resulting lacquers are characterized by excellent resistance to alkali, detergents, and water, combined with outstanding impact resistance and flexibility, as well as excellent clearness and clearness retention.
Reaction products with fatty acids (C5 –C10) are components of synthetic lubricants. A strongly growing market will be the use of these blended polyol esters in chlorine-free, purely fluorocarbon based refrigerant systems. Powder and high-solids coatings represent a strong potential market for TMP, because it contributes to low viscosity. TMP acrylates are used as reactive diluents in UV-cured systems for inks and coatings, and TMP allyl ethers in unsaturated polyesters.

Chemical Synthesis

Trimethylolpropane is made by the base-catalyzed aldol addition of butyraldehyde with formaldehyde followed by Cannizzaro reaction of the intermediate 2,2-bis(hydroxymethyl) butanal with additional formaldehyde and at least a stoichiometric quantity of base.

Purification Methods

Crystallise it from acetone and ether and it distils at high vacuum. [Beilstein 1 III 2349.]

Trimethylolpropane(77-99-6)Related Product Information

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• Tris Base