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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

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.