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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

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Physical & Chemical properties

Partition coefficient

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partition coefficient
Type of information:
not specified
Adequacy of study:
key study
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
data from handbook or collection of data
Published, peer-reviewed handbook.
Principles of method if other than guideline:
No further details are reported
GLP compliance:
not specified
Type of method:
other: not stated
Partition coefficient type:
Analytical method:
not specified
Key result
log Pow
Partition coefficient:
Remarks on result:
other: Handbook data. Temperature and pH not reported.

The logPow of the substance is reported to be 1.11.

Executive summary:

In the Handbook of Environmental Data on Organic Chemicals, the logPow of the substance is reported to be 1.11.

Description of key information

Triethylphosphat is reported to have a partition coefficient (logKow) of 1,11. (Handbook of Environmental Data on Organic Chemicals)

The substance has LOW potential to bioaccumulate in the environment, according to CLP classification criteria for aquatic chronic toxicity (log Kow <4 ).

Key value for chemical safety assessment

Log Kow (Log Pow):
at the temperature of:
20 °C

Additional information

Verscheuren (1996) reports the partition coefficient of the substance to be logPow = 1,11. This handbook is considered to be a reliable source, therefore it is regarded as a key study.

Temperature is not specified, but assumed to be ambient. As a phosphate ester, the structure contains no ionisable feature, therefore no impact of pH is anticipated.

As supporting data, logPow is estimated by QSAR to be 0.8 (Hansch et al, 1995).