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Physical & Chemical properties

Partition coefficient

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Description of key information

Estimated log Pow based on the individual solubility of the test item in water and n-octanol:

log Pow < -0.3

Key value for chemical safety assessment

Log Kow (Log Pow):
-0.3
at the temperature of:
20 °C

Additional information

The test item is a UVCB substance with an unknown and highly complex composition. Therefore, neither the estimation of the log Pow by QSAR nor its determination with OECD Guideline 107 (shake flask method) is feasible. For the HPLC-method (OECD Guideline 117), which is the recommended method for mixtures, the structural formula of the test item should be known and the test item must be soluble in the mobile phase at a sufficient concentration. The test item does not meet those requirements since its structural formula is not known and it is insoluble in the mobile phases applicable for this method. Consequently, the HPLC-method (OECD Guideline 117) is also not feasible and the log Pow of the test item can only be estimated from its individual solubility in water and in n-octanol. Considering the water solubility of 0.95 +/- 0.06 mg/L (95% confidence interval) at 20 °C +/- 1 °C and the octanol solubility of less than 0.5 mg/L a log Pow of < -0.7 has been estimated.