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Partition coefficient

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Description of key information

- Estimated based on individual solubilities:

log Pow= 0 at 23°C.

- Estimated based on fragment method:

log Pow= 0.5 at 25°C

Key value for chemical safety assessment

Additional information

The partition coefficient was estimated based on the ratio of the solubilities in n-octanol and in water.

The individual solubilities were determined by the flask method based on the ETAD method which was developed by intensive cooperation with the ETAD (Ecological and Toxicological Association of Dyes and Organic Pigments Manufacturers) and is regarded as acceptable for pigments by authorities. The concentration was quanitfied by HPLC with UV-Vis absorption.

In addition, a calculation based on fragment method using KOWWIN (v1.68) module of software EPI Suite v.4.11 yielded a log Pow value of 0.5.