Click for PDF
Technical Data Sheet
Eastman™ Triethyl Phosphate

  • Process solvents

Product Description
Eastman™ TEP (Triethyl Phosphate) is a clear, colorless liquid having a mild pleasant odor. TEP is useful as a solvent in many applications, as a plasticizer for tough, fire-resistant plastics, and as an agricultural chemical as an intermediate in preparing tetraethyl pyrophosphate (TEPP).

Typical Properties

PropertyTypical Value, Units
Molecular Weight182.16
Molecular Formula(C2H5O)3PO
     as H3PO40.002 %
FormClear, colorless liquid
OdorMild, cider-like
     Pt-Co<10 ppm
Specific Gravity 
     @ 20°C/20°C1.067-1.072
Boiling Point209 °C (408 °F)
Refractive Index1.4037 n(25°C/D)
Evaporation Rate 
     @ 100°C4.54 (g/1000 cm2)/h
     @ 20°C1.76 cP
     @ 71°C0.82 cP
Flash Point 
     Pensky-Martens Closed Cup99 °C (210 °F)
Fire Pointa141 °C (285 °F)
Flammability Limits in Air, % by Volume 
     Lower @ 139°C1.7 Vol %
     Upper @ 163°C10 Vol %
Water0.02 wt %
Melting Point-56 °C
Freezing Point-56 °C (-69 °F)
Assay99 wt % min.

aCleveland Open Cup

Properties reported here are typical of average lots. Eastman makes no representation that the material in any particular shipment will conform exactly to the values given.

Eastman and its marketing affiliates shall not be responsible for the use of this information, or of any product, method, or apparatus mentioned, and you must make your own determination of its suitability and completeness for your own use, for the protection of the environment, and for the health and safety of your employees and purchasers of your products. No warranty is made of the merchantability of fitness of any product, and nothing herein waives any of the Seller's conditions of sale.

2/28/2018 11:35:39 AM