Trimethylolpropane (TMP) CAS 77-99-6 manufacturer

TMP (C6H14O3) molecular formula and properties

Trimethylolpropane (TMP) CAS 77-99-6

Chemical Name: Trimethylolpropane

Synonymous Names: TMP; 1,1,1-Tris(hydroxymethyl)propane; 2-Ethyl-2-(hydroxymethyl)-1,3-propanediol; Propylidynetrimethanol; Hexaglycerol

CAS No.: 77-99-6

Molecular Formula: C6H14O3

Molecular Weight: 134.17 g/mol

Purity: ≥99%

EINECS No.: 201-074-9

Packaging: 25 kg/bag or 200 kg/drum

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What is Trimethylolpropane?

Trimethylolpropane, abbreviated as TMP, is a trifunctional polyol with three primary hydroxyl groups, mainly used as a raw material for the synthesis of alkyd resins, polyurethane coatings and elastomers, acrylate monomers for UV-curable systems, and synthetic lubricant esters.

Compared with glycerol TMP offers better hydrolysis resistance and thermal stability due to its neopentane-type carbon core structure, making it particularly suitable for high-performance coatings and synthetic lubricant applications.

The Trimethylolpropane supplied by Foconsci Chemical has a purity of ≥98%, appearing as white flaky crystals or granules.

Structural formula：

Product Description:

Item	Index
Product name	Trimethylolpropane (TMP)
CAS number	77-99-6
Appearance	Colorless to white flaky crystalline solid
Molecular weight	134.17 g/mol
Melting point	57–59°C
Boiling point	285°C
Flash point	172°C
Density	1.176 g/cm³
Solubility	Freely soluble in water and alcohols

Trimethylolpropane Applications:

Trimethylolpropane (TMP) is the crosslinking monomer for the production of alkyd resins and saturated polyester resins used in industrial coatings, paints, and coil coatings;
As a polyol raw material for polyurethane coatings, elastomers, and adhesives;
TMP is the raw material for the synthesis of Trimethylolpropane triacrylate (TMPTA)and its ethoxylated derivatives Trimethylolpropane Ethoxylate Triacrylate (EO-TMPTA) used in UV/EB-curable coatings, inks, and 3D printing resins;
As raw material for the synthesis of TMP ester synthetic lubricants used in aviation turbine oils, automotive engine oils, and refrigeration compressor oils;
As a surface treatment agent and dispersant for TiO₂ and other inorganic pigments.
Used as a glycerol substitute in alkyd resin synthesis, offering better hydrolysis resistance and thermal stability;
As a PVC heat stabilizer and textile auxiliary agent;
TMP can also used in the production of rosin esters and printing inks.