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77-99-6

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Identification

Name
Trimethylol propane
CAS
77-99-6
Synonyms
1,1,1-Trihydroxymethylpropane
1,1,1-TRIMETHYLOLPROPANE
1,1,1-TRIS(HYDROXYMETHYL)PROPANE
2,2-BIS(HYDROXYMETHYL)-1-BUTANOL
2,2'-DIHYDROXYMETHYL-1-BUTANOL
2-ETHYL-2-(HYDROXYMETHYL)-1,3-PROPANEDIOL
HEXAGLYCEROL
PROPYLIDYNETRIS(METHANOL)
TMP
TMPHYDRO(R)
TRIS(HYDROXYMETHYL)PROPANE
(propanetriyl)tris-methano
1,1,1-Tris(hydroxy)propane
1,1,1-tris(hydroxymethyl)-propan
2,2-bis(hydroxymethyl)-1-butanol[qr]
2,2-Dihydroxymethylbutanol
2-ethyl-2-(hydroxymethyl)-3-propanediol
2-Ethyl-2-(hydroxymethyl)propanediol
2-ethyl-2-hydroxymethyl-3-propanediol
3-Propanediol,2-ethyl-2-(hydroxymethyl)-1
EINECS(EC#)
201-074-9
Molecular Formula
C6H14O3
MDL Number
MFCD00004694
Molecular Weight
134.17
MOL File
77-99-6.mol

Chemical Properties

Appearance
Colorless, hygroscopic crystals. Soluble in water and alcohol. Combustible.
Appearance
white crystalline flakes
Melting point 
56-58 °C(lit.)

mp 
56-58 °C(lit.)

Boiling point 
159-161 °C2 mm Hg(lit.)

bp 
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)
Fp 
172 °C
storage temp. 
Store below +30°C.
solubility 
H2O: 0.1 g/mL, clear

form 
Flakes
pka
14.01±0.10(Predicted)
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
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.
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
77-99-6(EPA Substance)

Safety Data

Safety Statements 
S22:Do not breathe dust .
S24/25:Avoid contact with skin and eyes .
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

Raw materials And Preparation Products

Material Safety Data Sheet(MSDS)

Hazard Information

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.
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.
synthesis of trimethylolpropane (TMP)
Purification Methods
Crystallise it from acetone and ether and it distils at high vacuum. [Beilstein 1 III 2349.]

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