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Physical & Chemical properties

Partition coefficient

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Description of key information

Key value for chemical safety assessment

Log Kow (Log Pow):
at the temperature of:
22 °C

Additional information

The determination of the partition coefficient log POWof Keto Gulonic Acid Greens was performed using the flask shaking method as described in OECD guideline no. 117, “Preliminary estimate of the partition coefficient”.


The solubility in water was determined in the main test of Harlan Laboratories StudyC82534and the solubility in n‑octanol was determined using a simplified flask method. The solubility in water was found to be clearly above the solubility in n-octanol indicating a partition coefficient below -2. Hence, a main test according to OECD Guidelines 107/117 (either HPLC or flask shaking method) could not be applied.


Based on the individual solubilities in n‑octanol and in water, respectively, the log POWwas calculated to be:


log POW= -2.05 at 22 °C


The pH in the aqueous phase (determined in Study C82534) was 0.4.