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Adsorption / desorption

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Description of key information

A measured log Koc of >5.63 is available for alkenes C20 - 24. A log Koc of >6.56 has been read across from a QSAR calculation for hexadecene.

Key value for chemical safety assessment

Additional information

A measured Koc is available for alkenes C20 - 24. Fox and White (2008) report a log Koc of >5.63 using the HPLC screening column method.

In addition, soil sorption of non-ionic substances can be estimated from their log Kow. Several QSARs have been developed that calculate the Koc of non-polar hydrocarbons on the basis of their log Kow (e.g. Sabljic and Gusten, 1995). The log Kow range of alkenes C20 -24 falls outside the applicability domain of this model. However, there is a clear trend across this category of increasing log Koc with increasing carbon number. Therefore, on the basis of read across from hexadecene the log Koc is >6.56.