Triethyl phosphate
CAS 78-40-0
EC 201-114-5
Formula C6H15O4P
MW 182.15 g/mol
Flame Retardants Plastics & PolymersBuilding & ConstructionTextile, Leather & PaperAerospace & DefenseAutomotive Flame RetardancypH Regulation & Buffering
Description
Triethyl phosphate (TEP, CAS 78-40-0) is an organophosphorus compound supplied under trade names including Fyrol TEP, Levagard TEP, and SP 0724. It carries no E-code designation and is identified under EC 201-114-5. The molecular formula is C6H15O4P, with the structural shorthand (C2H5O)3PO commonly used in technical literature.
In plastics and polymer formulations, TEP acts as a reactive and additive flame retardant by releasing phosphoric acid derivatives during combustion, interrupting the radical chain reaction in the gas phase. In textile and paper processing, it functions as a pH buffer, stabilising acidic or alkaline process baths where precise pH control affects dye uptake or coating adhesion.
TEP is supplied as a liquid in standard industrial packaging and is subject to REACH registration requirements for EU market supply. Buyers should confirm grade specifications, including purity and water content, against their formulation requirements. HS code 29190090 applies for import and export classification.
In plastics and polymer formulations, TEP acts as a reactive and additive flame retardant by releasing phosphoric acid derivatives during combustion, interrupting the radical chain reaction in the gas phase. In textile and paper processing, it functions as a pH buffer, stabilising acidic or alkaline process baths where precise pH control affects dye uptake or coating adhesion.
TEP is supplied as a liquid in standard industrial packaging and is subject to REACH registration requirements for EU market supply. Buyers should confirm grade specifications, including purity and water content, against their formulation requirements. HS code 29190090 applies for import and export classification.
Physical Properties
| Melting Point | -56.4 °C |
| Boiling Point | 215-216 °C |
| Density | 1.0725 g/cm³ @ Temp: 19 °C |
| Flash Point | 240 °F |
| Appearance | Colorless, high-boiling liquid; mild odor. Very stable at ordinary temperatures, compatible with many gums and resins, soluble in most organic solvents, miscible with water. When mixed with water is quite stable at room temperature, but at elevated temper |
| Color | Clear |
| Odor | mild cider |
| Form | Liquid |
| Water Solubility | SOLUBLE |
| Vapor Pressure | 1 mm Hg ( 40 °C) |
| Refractive Index | n 20/D 1.403(lit.) |
| pH | 7 (H2O, 20℃) |
| Log P | 1.11 at 20℃ |
Safety & Handling (Learn More)
Warning GHS07 GHS08
H
H302H319H336H361H371
P
P203P260P261P264P270P271P280P318P319P330P405P501P264+P265P301+P317P304+P340P308+P316P337+P317P403+P233P305+P351+P338
Trade & Regulatory
| HS Code | 29190090 |
| WGK (Germany) | 1 |
Other Names
ethyl phosphatetriethylphosphateTEPSP 0724Fyrol TEP(C2H5O)3POLevagard TEPLevagard TEP-Z
Related Products
Raw Materials
Derivatives
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