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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Physical & Chemical properties

Endpoint summary

Administrative data

Description of key information

Triethylphosphate is a fluid liquid, almost as dense as water, with low volatility, low potential for bioaccumulation, and moderate solubility in water.

It is not classified for physical hazards.

Additional information

Triethyl phosphate is a clear, colourless, organic liquid.





Melting point

-56.4 °C

Boiling point

215 °C (atmP assumed)


1.066 g/cm³ (ambient T assumed)

Vapour pressure

0.523 hPa at 25°C

Partition Coefficient

logPow = 1,11

Water solubility

500 g/L at 25°C

Surface Tension

not expected from structure

Flash point

115 °C

Auto flammability

454 °C



Explosive properties

not expected from structure

Oxidising properties

not expected from structure

Stability in organic solvents

not considered critical

Dissociation constant

no ionisable feature, from structure

Viscosity (kinematic)

1.46 mm2/s (ambient T assumed)