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Physical & Chemical properties

Partition coefficient

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partition coefficient
Type of information:
experimental study
Adequacy of study:
key study
Study period:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
according to guideline
OECD Guideline 117 (Partition Coefficient (n-octanol / water), HPLC Method)
according to guideline
EU Method A.8 (Partition Coefficient)
according to guideline
EPA OPPTS 830.7570 (Partition Coefficient, n-octanol / H2O, Estimation by Liquid Chromatography)
GLP compliance:
yes (incl. QA statement)
Type of method:
HPLC method
Partition coefficient type:
Specific details on test material used for the study:
- Names of test material (as cited in study report): Aldehyde C12 MNA Pure, 2-methylundecanal
- Substance type: Colourless liquid
- Physical state: Liquid
- Impurities (identity and concentrations): No data
- Composition of test material, percentage of components: No data
- Isomers composition: No data
- Purity test date: No data
- Lot No: VE00104771
- Expiration date of the lot: No data
- Stability under test conditions: No data
- Storage condition of test material: No data
Analytical method:
high-performance liquid chromatography
log Pow
Partition coefficient:
35 °C
Remarks on result:
other: pH not determined
Details on results:
- Representative chromatograms are presented in Appendices 3 and 4 (attached).
The n-octanol/water partition coefficient (Log Pow) was determined to be 4.9

Description of key information

Partition coefficient, Log Pow = 4.9 (OECD 117)

Key value for chemical safety assessment

Log Kow (Log Pow):
at the temperature of:
35 °C

Additional information

In Givaudan study No. 10-E160, to OECD 117 and GLP, the partition coefficient was determined to be as follows; Log Pow was 4.9 at a temperature of 35 °C.

The determination was performed at 35°C (temperature of the column), but the value obtained can be considered to represent the value at an unspecified, probably ambient temperature since no mention is made in the guidelines of the temperature at which the tabulated reference substances log Pow values were determined. Partition coefficients of the test and reference substances are assumed to vary with temperature in the same way.