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Partition coefficient

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Description of key information

Key value for chemical safety assessment

Additional information

The study does not need to be conducted because the partition coefficient of a UVCB substance of this nature should be evaluated on the basis of the properties of its constituents. A result for the whole substance is not meaningful scientifically for the purpose of assessment of exposure or risk. It is therefore not appropriate to conduct or propose a test for this endpoint. The needs associated with a sound understanding of partition coefficient are adequately met by the available data on constituents. Reliable partition coefficient data are characterised by quantitative structure activity relationships (QSARs) for constituents of the substance.

In other supporting study conducted according to OECD 117, a partition coefficient value of seven and nine constituents at pH 7.5 and pH 2.0 was 4.6 - 8.0 and 4.4 - 7.8 respectively. The test temperature was 35 °C. The individual components in the study were not identified.

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