Registration Dossier
Registration Dossier
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EC number: - | CAS number: -
Partition coefficient
Administrative data
Link to relevant study record(s)
Description of key information
No method is available for the determination of the Pow of the registered substance. The key value for chemical safety assessment is the log Pow of the solid content of the registered substance, which was determined to be -2.31 at 25°C.
Key value for chemical safety assessment
- Log Kow (Log Pow):
- -2.31
- at the temperature of:
- 25 °C
Additional information
The partition coefficient of a freeze dried sample of the substance, representing the solid content of the registered substance, was determined with the slow stirring method, in accordance with OECD 123.
In addition the estimation method was applied for the determination of the partition coefficient (Pow) of the solid content of the substance, using the in water determined critical micelle concentration (CMC) and the n-octanol solubility. The Pow value at 20°C was determined to be ≥ 2.06E+3 (corresponding with a log Pow value of ≥ 3.3). This value is considered less reliable than the value determined with the slow stirring method. Also the log Pow obtained with the slow stirring method is supported by calculations: by applying the KOWWIN Program (v1.67) in the US EPA 2009 Estimation Programs Interface (EPI) SuiteTM, the calculated log Kow for 2 main constituents of the solid content of the registered substance was -2.72 and the calculated log Kow for 2 other main constituents was -1.13.
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
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