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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Physical & Chemical properties

Partition coefficient

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Description of key information

Experimental value in the key study of Pow at pH 1 and 25°C: 496 ± 21.7
Experimental value in the key study of Log Pow at pH 1 and 25°C: 2.70
Calculated (with KOWWIN) value in the key study of Log Pow of the test item ionized form: 2.44
Calculated (with KOWWIN) value in the key study of Log Pow of the test item single charged anion : -0.45
Calculated (with KOWWIN) value in the key study of Log Pow of the test item double charged anions : -2.29

Key value for chemical safety assessment

Log Kow (Log Pow):
2.7
at the temperature of:
25 °C

Additional information

The key and the supporting study were performed according to Method 107 of the OECD Guidelines for Testing of Chemical and GLP. A deviation from this method was observed in the key study. Indeed, the shake flask method can't be used for surface active agents. But, with the adjustment of pH at 1, the test item was totally unionized and the surface active properties of the test item disappears so the shake flask method could be used to determined the partition coefficient of this test item.

The key study give an experimental value for Log Pow at 25°C and pH 1. The supporting study confirms the surface active properties of the test item at higher pH than 1.

In the key study, estimations of the partition coefficient on the ionized form of the test item were obtained from KOWWIN v1.68a (Sept 2010) © 2000 U.S. Environmental Protection Agency, by inputting the appropriate sodium salts of the acid, and resulted in logPowvalues of -0.45 and -2.29 for the single and double charged anions respectively.