Registration Dossier

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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Additional information

Tris(2-butoxyethyl)-phosphate (TBEP) is an organic substance, liquid and colourless at 20°C and 101.3 kPa with a mild odour. The substance is considered surface active, is moderately soluble in water and based on the log Kow value, has a potential for bioaccumulation. TBEP exhibits a low vapour pressure therefore if released in the environment, the substance is not expected to go to the air compartment.

With regard to physical hazards, TBEP is not a fammable liquid and explosive or oxidising properties are not anticipated.

Summary of relevant physico-chemical properties:




Colourless liquid with mild odour

Freezing point


Boiling point


Relative density

1.02 at 20°C

Vapour pressure

1.52 x 10^-5 Pa at 25°C

Log Kow


Water solubility

663.5 mg/L at 20°C

Surface tension

32.7 mN/m at 20°C


Flash point = 159°C

Auto-flammability temperature = 322°C

Non flammable liquid.

Explosive properties

Not anticipated (based on chemical structure)

Oxidising properties

Not anticipated (based on chemical structure)

Viscosity (dynamic)

12.4 mPa/s