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Partition coefficient

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Description of key information

log Pow - experimental value (slow-stirring method - OECD 123): 3.14
log Pow - calculated using EPIsuite v 4.10 (weight-averaged value): 3.54
log Pow - calculated from weight-averaged log Koc value: 3.90

Key value for chemical safety assessment

Log Kow (Log Pow):
3.53
at the temperature of:
25 °C

Additional information

The key value for chemical safety assessment is derived from the experimentally determined log Pow value (slow-stirring method - OECD 123) as well as the calculated log Pow values for Alcohols, C10-12, ethoxylated (EO < 2.5) (CAS 67254 -71 -1). Two types of calculations were applied:

1. based on weight-averaged log Koc values using the TGD equation for predominantly hydrophobic substances: log Koc = 0.81 log Pow + 0.10 thus log Pow = (log Koc – 0.10)/0.81) (2003 EU Technical Guidance Document on Risk Assessment Part III, Chapter 4, Section 4.3 (pp 24 – 27)

2. based on EPIsuite v 4.10, KOWWIN v 1.68 log Pow values for (possible) individual constituents of the substance; a weighting based on normalized composition was applied to derive a log Pow value for the whole substance.

The key value for chemical safety assessment is an average of all 3 log Pow values (3.14, 3.54 and 3.90) obtained with the calculation and in the experiment.