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Environmental fate & pathways

Adsorption / desorption

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Description of key information

An experimentally determined log Koc=2.8 (Koc=692) was obtained in a study conducted according to OECD Guideline 121 and EU Method C.19. The calculation yielded a log Koc=2.9 (Koc=817).

Key value for chemical safety assessment

Koc at 20 °C:
692

Additional information

The soil adsorption coefficient of alpha-methylstyrene was determined in a study conducted according to OECD Guideline 121 and EU Method C.19. The soil adsorption coefficient log Koc was determined to be 2.8 (Koc=692). The calculation (EPIWIN v3.11, PCKOC v1.66) of the soil sorption coefficient Koc of alpha-methylstyrene yielded a Koc=817 (log Koc=2.9). Based on the results and taking into account the classification scheme of Blume and Ahlsdorf (1993), alpha-methylstyrene can be regarded as a substance with high sorption potential onto soil organic matter.