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Trimethylolpropane

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Trimethylolpropane Basic information

Product Name:
Trimethylolpropane
Synonyms:
  • 1,1,1-TRIS(HYDROXYMETHYL)PROPANE, DIST.
  • TrimethanolPropane
  • 1,3-Propanediol, 2-ethyl-2-(hydroxymethyl)-
  • Trimethylol
  • Abbreviation
  • propylidynetrimethanol
  • Trimethylolpropane, carbamate with tolylene diisocyanate solution
  • Trimethyloy propane
CAS:
77-99-6
MF:
C6H14O3
MW:
134.17
EINECS:
201-074-9
Product Categories:
  • Building Blocks
  • Chemical Synthesis
  • Organic Building Blocks
  • Oxygen Compounds
  • Polyols
  • Additive Chemicals
Mol File:
77-99-6.mol
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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)
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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

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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 Preparation Products And Raw materials

Preparation Products

Raw materials

TrimethylolpropaneSupplier

Shandong Jinyueyuan New Material Co. Ltd Gold
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J & K SCIENTIFIC LTD.
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Alfa Aesar
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