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Partition coefficient

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Description of key information

The log kow of the registered substance has been determined as 0.7.

Key value for chemical safety assessment

Log Kow (Log Pow):
0.7
at the temperature of:
20 °C

Additional information

Using a method specifically developed for pigments ('ETAD-method'), the log kow of the registered substance PR 264 has been determined by the ratio of the solubilities in octanol (0.252 mg/L) and in water (0.048 mg/L) resulting in a value of 0.7.

A log Pow value of 5 of the registered substance PR 264 was determined in a study conducted according to the EU A.8 Method (HPLC), that is included in a NONS provided by ECHA. As insufficient data are available, this study is considered not reliable and is disregarded, as the HPLC method is very likely technically not applicable to the water insoluble substance PR 264.