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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Diss Factsheets

Physical & Chemical properties

Partition coefficient

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Administrative data

Link to relevant study record(s)

Description of key information

Log Pow is taken as 2.8 at 25 deg C

Key value for chemical safety assessment

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

Additional information

Experimental values of 2.8 (Chilworth - shake flask) and 2.7/3.6 (Dybdahl - hplc) have been obtained in unbuffered solution. The calculated values are 5.35 and 7.3. These differences illustrate the difficulties in establishing log Pow values for chemically modified rosins, i.e. chemically modified UVCB substances. In view of their consistency, the experimental values for log Pow have been preferred to the calculated values.

The wide range of partition coefficient values for the substances is due to the chemical structures of the ingredients, as they are composed of ionisable organic acids. The substance is a UVCB and therefore can exhibit more than one peak and log Kow value.