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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

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Physical & Chemical properties

Partition coefficient

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Description of key information

The partition coefficient of HHCB has been determined as log P = 5.3 at 25°C using the slow stirring method in this published study.

Key value for chemical safety assessment

Log Kow (Log Pow):
at the temperature of:
25 °C

Additional information

The log Kow of HHCB was found to be 5.3 at 25 °C and a pH of circa 7 in a non-GLP study according to Brooke et al., 1986 using a slow-stirring method. A value of 5.9 at 25 °C was reported in a GLP study according to OECD guideline 117 using the HPLC method, but as the method used is not optimally suited for this substance, this study is considered a supporting study.