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EC number: 905-562-9 | CAS number: -
Adsorption / desorption
Administrative data
Link to relevant study record(s)
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 reliable adsorption/desorption study with the reaction mass of Ethylbenzene and m- and p-Xylene as the test substance was not identified. However, a study using the constituent o-xylene that was conducted to a method equivalent to OECD 121 was obtained (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 was 2.73, which fell within the calibration range. Based on similar physico-chemical properties, this value is considered appropriate for read across.
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