Registration Dossier

Environmental fate & pathways

Adsorption / desorption

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Description of key information

The calculated log Koc values for substances in this category range from 1.315 - 6.256. The range in values is considered to be due to different constituents within the UVCB having different adsorption potential.

Key value for chemical safety assessment

Additional information

As these are poorly soluble UVCB substances it is extremely difficult to measure a Koc value experimentally. The Koc values for these substances have therefore been calculated based on an experimental Kow value, following the equation in the EU Technical Guidance Document (2003) and the ECHA Guidance Document R7a (2008): log Koc = 0.81 Log Kow + 0.1.