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Environmental fate & pathways

Adsorption / desorption

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Description of key information

The Koc value of benzyl alcohol is calculated to be 15.7.

Key value for chemical safety assessment

Koc at 20 °C:
15.7

Additional information

In accordance with column 2 of REACH Annex VIII, a study on Adsorption/desorption (required in section 9.3.1) does not need to be conducted if the substance is expected to have a low potential for adsorption. Benzyl alcohol is expected to have a low potential for adsorption because of the following reasons:

Based on several studies and calculations (see IUCLID section 4.7) , the logPow of benzyl alcohol is 1.1, which is below the cut-off value of 3. In addition, benzyl alcohol is neither ionisable nor surface active (please refer to IUCLID chapter 4). According to the "Guidance on information requirements and chemical safety assessment, Chapter R.7a: Endpoint specific guidance", it is thus possible to estimate the Koc using QSAR calculation. Applying the QSAR estimation PCKOCWIN v1.6.6, the Koc is calculated to be 15.7.

This estimated value is supported by experimental Koc values of <5-16 cited in the US EPA Document (1989). Thus, adsorption to sediment and suspended organic matter is not expected to be an important fate process of benzyl alcohol.