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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

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Description of key information

The logPow of the substance is 2.21 ± 0.04 at 20 deg. C.

Key value for chemical safety assessment

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

Additional information

The octanol/water partition coefficient (logPow) was determined by the shake flask method according to OECD 107 guidelines.


The concentration of test substance in the octanol and the water phase was determined by GC-MS following conversion of the ZDDPs (zinc dialkyldithiophosphates) in each phase to halogenated derivatives with pentafluorobenzyl bromide (CASRN 1765-40-8). The derivatization process cleaves the intact ZDDP (zinc dialkyldithiophosphate) molecule in two replacing the zinc atom with two pentafluorobenzyl branches forming two pentafluorobenzyl phosphorodithioic acid molecules, each with two alkyl groups. 


The logPow of the substance is 2.21 ± 0.04 at 20 deg. C.