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Partition coefficient

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Description of key information

The calculated (using the calculation method of the EU A.8 guideline) and estimated (using KOWWIN v.1.68 of EPIWEB v.4.1) log partition coefficients of the test substance were determined to be 6.05 (Younis S, 2012) and 5.45 (US EPA, 2012) , respectively.

Key value for chemical safety assessment

Log Kow (Log Pow):

Additional information

The partition coefficient of the main constituent ((i.e., (9E,12E)-N,N-bis(2-hydroxyethyl) octadeca-9,12-dienamide) of the test substance was determined according to the calculation method of the EU A.8 guideline. The octanol/water partition coefficient was derived using the expression: Log P = sum of fragments (α) + sum of factors (β) (Younis S, 2012).

The logarithmic octanol-water partition coefficient (log Kow) was estimated using KOWWIN v1.68 program of EPIWEB v 4.1.Initially, using SMILES as the input parameter in the KOWWIN v1.68 program, the values of the Kow was calculated for the individual components. Finally, the overall water solubility value was calculated on a weighted-average basis using the mole fractions of the individual components (US EPA, 2012).