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Physical & Chemical properties

Partition coefficient

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Description of key information

The Partition coefficient (Log Kow) of the substance is estimated to be 3.90.

Key value for chemical safety assessment

Log Kow (Log Pow):
3.9

Additional information

The partition coefficient of the test material was estimated using the calculation software KOWWIN v. 1.68 (EPISuite v 4.1). The calculation was performed with a validated model and is considered to be a good representation of the physical-chemical properties of the substance. The calculation was therefore assigned a reliability score of 2 in accordance with the criteria for assessing data quality, as outlined in Klimisch (1997).

 

Taking into consideration analogue data (Estimated log Kow = 3.9, Measured log Kow = 3.1 for 3-(3-isopropylphenyl)butanal; see table 2 in read-across justification document) , the KOWWIN model is considered to overestimate the partition coefficient of the test substance. Therefore the model estimate is considered to be conservative and worst-case for the purposes of hazard assessment.