1,1,1-Trimethylolpropane
CAS 77-99-6
EC 201-074-9
Formula C6H14O3
MW 134.17 g/mol
Monomers & Building Blocks Personal Care & CosmeticsPlastics & PolymersCoatings, Adhesives, Sealants & Elastomers Antioxidant & StabilizerCross-linking & CuringHumectant & Moisturizing
Description
1,1,1-Trimethylolpropane (TMP, CAS 77-99-6) is a trifunctional aliphatic alcohol commercially available under trade names including Ettriol and TMPHYDRO. It carries no assigned E-code and is classified under HS code 29054100. Its three hydroxyl groups make it a reactive building block in polymer and coating chemistry.
In polyurethane and alkyd resin production, TMP acts as a crosslinker by reacting with isocyanates or fatty acids through all three hydroxyl sites, increasing network density and improving hardness and chemical resistance. In personal care formulations, it functions as a humectant and conditioning agent, binding moisture within the skin or hair matrix.
TMP is supplied in flake form and is subject to REACH registration requirements within the EU. Procurement teams should confirm supplier SDS documentation and purity grade to align with end-use specifications in coatings, adhesives, or cosmetic applications. Standard industrial packaging typically includes 25 kg bags or bulk options.
In polyurethane and alkyd resin production, TMP acts as a crosslinker by reacting with isocyanates or fatty acids through all three hydroxyl sites, increasing network density and improving hardness and chemical resistance. In personal care formulations, it functions as a humectant and conditioning agent, binding moisture within the skin or hair matrix.
TMP is supplied in flake form and is subject to REACH registration requirements within the EU. Procurement teams should confirm supplier SDS documentation and purity grade to align with end-use specifications in coatings, adhesives, or cosmetic applications. Standard industrial packaging typically includes 25 kg bags or bulk options.
Physical Properties
| Melting Point | 58 °C |
| Boiling Point | 160 °C @ Press: 5 Torr |
| Density | 1.176 |
| Flash Point | 172 °C |
| Appearance | Colorless, hygroscopic crystals. Soluble in water and alcohol. Combustible. |
| Color | White |
| Form | Flakes |
| Water Solubility | soluble |
| Vapor Pressure | <1 mm Hg ( 20 °C) |
| Refractive Index | 1.4850 (estimate) |
| pH | 6.5 (100g/l, H2O, 20℃)(External MSDS) |
| Log P | -0.975 (est) |
Safety & Handling (Learn More)
Danger GHS08
H
H360
P
P203P280P318P405P501
Trade & Regulatory
| HS Code | 29054100 |
| Storage Class | 11 - Combustible Solids |
| WGK (Germany) | 1 |
Other Names
2-ethyl-2-(hydroxymethyl)propane-1,3-diolTrimethylolpropane2-ethyl-2-hydroxymethyl-1,3-propanediolTMPEttriolTMPHYDRO(R)HEXAGLYCEROLTrimethylol propaneEthyltrimethylolmethane
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