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Partition coefficient

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Reference
Endpoint:
partition coefficient
Type of information:
experimental study
Adequacy of study:
key study
Study period:
26.09.2018
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
OECD Guideline 117 (Partition Coefficient (n-octanol / water), HPLC Method)
Version / remarks:
Adopted 13 April 2004
Deviations:
yes
Remarks:
See Any other information
Qualifier:
according to
Guideline:
EU Method A.8 (Partition Coefficient - Shake Flask Method)
Version / remarks:
Council regulation (EC) No 440/2008, O.J. L 142, 2008
Deviations:
yes
Remarks:
See Any other information
GLP compliance:
yes (incl. certificate)
Type of method:
HPLC method
Partition coefficient type:
octanol-water
Analytical method:
high-performance liquid chromatography
Key result
Type:
log Pow
Partition coefficient:
3.98
Temp.:
23 °C
pH:
6.8

Deviation: Due to the low solubility of the fluoranthene standard in the solvent, only five calibration points were used to construct the calibration curve. This deviation from the study plan has no negative impact on study results.There were no other deviations from study plan and/or quoted method during the study.

Conclusions:
Partition coefficient (log P) of the test item, Ethylcentralit, is:
log Pow = 3.98 ± 0.42 (pH 6.8, 23°C)  
Executive summary:

The partition coefficient of the test item, Ethylcentralit, was determined.

Based on the results of the preliminary estimation of the partition coefficient by a calculation method, the HPLC method was used for the main experiment.

The procedure was performed according to Method A.8. – Partition Coefficient, Council Regulation (EC) No.440/2008, Published in O.J. L 142, 2008.

Partition coefficient (log P) of the test item, Ethylcentralit, is:

log Pow = 3.98 ± 0.42 (pH 6.8, 23°C)  

Description of key information

Few data describe the partitioning behavior of ethyl centralite. All values Log Kow were received by calculation method.

Key experimental study provide this result:

Partition coefficient (log P) of the test item, Ethylcentralit, is: log P = 3.98±0.42 (23 °C, pH = 6.8)

Key value for chemical safety assessment

Log Kow (Log Pow):
3.98
at the temperature of:
23 °C

Additional information