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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

partition coefficient
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
data from handbook or collection of data
no guideline followed
Principles of method if other than guideline:
Handbook data
GLP compliance:
not specified
Type of method:
other: not specified
Partition coefficient type:
Analytical method:
not specified
log Pow
Partition coefficient:
Remarks on result:
other: experimental database match of the QSAR model software EpiSuite v.4.1; temperature not reported but room temperature assumed.
According to an experimental database match (Hansch, C. et al. 1995) of the QSAR model software EpiSuite v.4.1, propionic acid (SMILES code: CCC(=O)O) has a log Kow of 0.33 (no temperature provided) whereas the log Kow estimated with KOWWIN v1.68 amounts to 0.58 at 25°C.

Description of key information

The log Kow of the substance is 0.33 at 25 °C.

Key value for chemical safety assessment

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

Additional information