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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

A study was conducted on the material UC using EU Method A8, the partition coefficient was determined to be > 6.5. Results were also obtained on the two surrogate materials (EHMC and UMC), all three substances recorded log Pow values of > 6.0.
All three substances have very high log Pow values, which means these substances could have the potential to bioaccumulate.

Key value for chemical safety assessment

Log Kow (Log Pow):
6.5
at the temperature of:
20 °C

Additional information

We have additional data to compare the surrogate materials (EHMC and UMC) to the substance UC.

For EHMC we have both a QSAR and a result using EU Method A8, the study value was estimated to be between 6.05 and 6.32, whereas the QSAR was estimated to be 6.96.

For UMC a QSAR was also conducted using EPIWIN, this substance was also predicted to have a very high log Pow reading of 8.37.

A study was conducted on the material UC using EU Method A8, the partition coefficient was determined to be > 6.5.

All three substances have very high log Pow values, which means these substances could have the potential to bioaccumulate in the environment.