Trimethyl phosphate
CAS 512-56-1
EC 208-144-8
Formula C3H9O4P
MW 140.07 g/mol
Flame Retardants Plastics & PolymersElectronicsBuilding & ConstructionTextile, Leather & Paper Flame RetardancypH Regulation & Buffering
Description
Trimethyl Phosphate (CAS 512-56-1, EC 208-144-8) is an organophosphorus compound supplied as a clear liquid, commonly abbreviated as TMP or TMPA and also referenced under identifiers NSC 58985 and NCI-C03781. It carries no assigned E-code and is classified within the flame retardant chemical category.
In polymer and textile processing, Trimethyl Phosphate acts as a reactive or additive flame retardant by releasing phosphoric acid species during combustion, which promotes char formation and interrupts the combustion cycle. It also functions as a pH buffer in industrial formulations, stabilising acidic or mildly alkaline process environments in paper, leather, and electronics manufacturing.
Trimethyl Phosphate is available in technical and high-purity grades, supplied in standard bulk liquid formats suitable for industrial procurement. The substance is registered under REACH and subject to standard European chemical handling regulations. Buyers should confirm grade specifications and SDS documentation prior to ordering.
In polymer and textile processing, Trimethyl Phosphate acts as a reactive or additive flame retardant by releasing phosphoric acid species during combustion, which promotes char formation and interrupts the combustion cycle. It also functions as a pH buffer in industrial formulations, stabilising acidic or mildly alkaline process environments in paper, leather, and electronics manufacturing.
Trimethyl Phosphate is available in technical and high-purity grades, supplied in standard bulk liquid formats suitable for industrial procurement. The substance is registered under REACH and subject to standard European chemical handling regulations. Buyers should confirm grade specifications and SDS documentation prior to ordering.
Physical Properties
| Melting Point | -46 °C |
| Boiling Point | 85 °C @ Press: 26 Torr |
| Density | 1.2144 g/cm³ @ Temp: 20 °C |
| Flash Point | 107 °C |
| Appearance | Clear liquid |
| Color | Clear |
| Form | Liquid |
| Water Solubility | 500 G/L (25 ºC) |
| Vapor Pressure | 1.133 hPa (25 °C) |
| Refractive Index | n 20/D 1.395(lit.) |
| Log P | -0.46 at 25℃ |
Safety & Handling (Learn More)
Danger GHS07 GHS08
H
H302H315H319H320H340H351H360H361H371H373
P
P203P260P264P270P280P318P319P321P330P405P501P264+P265P301+P317P302+P352P308+P316P332+P317P337+P317P362+P364P305+P351+P338
Trade & Regulatory
| HS Code | 29199000 |
| Storage Class | 6.1C - Combustible acute toxic Cat.3 toxic compounds or compounds which causing chronic effects |
| WGK (Germany) | 1 |
Other Names
TMPTMPATMPO(CH3O)3PONCI-C03781METHYL PHOSPHATETrimethyl orthophosphate
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