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Physical & Chemical properties

Partition coefficient

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Description of key information

According to the OECD 117 the partition coefficient (log Pow) was determined to be above 6.2 at 25°C and with extrapolation of the linear standard curve determined by the reference substances a value of 8.76 for the log Pow of the test substance could be calculated.

Key value for chemical safety assessment

Log Kow (Log Pow):
8.76
at the temperature of:
25 °C

Additional information

This endpoint was covered by read-across of a study of 1,4-bis[(2-ethyl-6-methylphenyl)amino]anthraquinone. This read-across is justified as both substances have very similar chemical structures, the main physicochemical parameters (vapour pressure, water solubility and dissociation constant) are in the same range and further all available toxicological studies for both substances revealed the same results. Therefore a read-across for other physicochemical, ecotoxicological or toxicological endpoints seems to be justified. More details about the read-across justification are displayed in a detailed document attached to the Annex of the CSR.