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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Partition coefficient

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Administrative data

Link to relevant study record(s)

Description of key information

The log pow of the xylene isomers ranges from 3.12 to 3.2. The log pow of m-xylene was reported as 3.2, for o-xylene as 3.12 and for p-xylene the log pow is 3.15. The mean value is 3.16.

Key value for chemical safety assessment

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

Additional information

Hansch et al (1995) is a peer reviewed handbook and so can be considered reliable and suitable for use as the key study for this endpoint. The data are supported by the results from another review article (Leo et al 1971), which give partition coefficients for m-xylene, o-xylene and p-xylene of 3.2, 2.77 and 3.15, respectively.