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Physical & Chemical properties

Partition coefficient

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Description of key information

The Log Pow measured of this complex reaction product are ranged from 1.73 to 3.11. 76.2% of the components of this UVCB have Log Pow ranged from 2.17 to 2.61. 

Key value for chemical safety assessment

Log Kow (Log Pow):
2.61

Additional information

To appraise the octanol/water partition coefficient of the test item, this endpoint was experimentally measured in accordance with OECD testing guideline 117 and GLP requirements.

The chromatogram obtained by HPLC showed eight peaks with four representing each between 16.5% and 24% of the total area under the curve and together more than 75% of all this UVCB. The other peaks covered each less than 10% of the total area under the curve. These four peaks representing the most abundant components of this complex reaction product (>>10%), the highest log value (2.61) in this range was used for chemical safety assessment (CSA). The highest value was considered as a worst-case value, increase of n-octanol/water partition coefficient value leading to a significant increase of Predicted Environmental Concentration in sediments and soil.