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Physical & Chemical properties

Partition coefficient

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Description of key information

No valid study on the octanol-water partitioning coefficient of chloroform was found. The available data were used in a weight-of-evidence approach.

Key value for chemical safety assessment

Log Kow (Log Pow):
1.97
at the temperature of:
20 °C

Additional information

The octanol-water partitioning behaviour of chloroform was determined experimentally. The measurements of Hansch and Anderson (1967) with shaking-flask method and gas-liquid chromatography to determine the chloroform in the aqueous phase produced a value for the log P of 1.97. This value was based on five consecutive experiments. Methods for the indirect determination of the log P value and calculation methods based on quantitative structure-activity relationships (QSARs) produce log P values for chloroform ranging from 1.43 to 2.09. In conclusion, there is evidence that the log P value for chloroform is approximately 2, and it is suggested to use the experimental value of 1.97 (Hansch and Anderson 1967) for the log P of chloroform.