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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Link to relevant study record(s)

Description of key information

The n-octanol:water partition coefficient of 4-Oxo tempo (99.1% purity) was determined to be log 0.28 at 22°C and pH 7. 

Key value for chemical safety assessment

Log Kow (Log Pow):
at the temperature of:
22 °C

Additional information

The octanol :water partition coefficient of a sample of 4 -Oxo Tempo was determined in an in-house study.

The study was conducted to the appropriate OECD guideline although not to GLP. Certain details are not included in the study report although this is considered not to affect the quality of the results. The study was assigned a reliability rating of 2 according to the criteria of Klimisch 1997.