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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Adsorption / desorption

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Description of key information

The log Koc of o-xylene estimated using a HPLC method is 2.73.

Key value for chemical safety assessment

Koc at 20 °C:
537

Additional information

The log Kow of the xylene isomers ranges from 3.12 to 3.2 which suggests that they have the potential to sorb to soil and sediment. A study using o-xylene that was conducted to a method equivalent to OECD 121 was identified ( Hodson et al 1988). A range of compounds for which reliable K and Koc values were available were used to generate a regression equation that related retention time on the HPLC column to Koc value. This allowed the Koc of o-xylene to be estimated based on the measured K value. The log Koc of o-xylene fell within the calibration range.

Due to the very similar log Kow of the xylene isomers we expect that the results for o-xylene will also be representative of the other two isomers.

[LogKoc: 2.73]