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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

In a read-across approach, hydrolysis studies from similar alkyl phosphate esters (Tris-chlorpropyl phosphate, Dibutyl-phosphate) were proven to be stable at 50°C and pH4, 7 and 9.

Mabey & Mill (1978) review the available published hydrolysis data for a number of chemicals. Neutral hydrolysis is reported to be the dominant process for this class of compounds (phosphoric acid esters) at pH7. A half-life of 5.5 years is calculated, based on the rate of hydrolysis at neutral pH.  The second order alkaline hydrolysis rate constant is estimated to be 1.75 x 10 -5 M-1 sec-1 at 27 degrees Celsius (Wolfe, 1980).


The substance triethyl phosphate is stable to hydrolysis under normal environmental conditions.

Additional information