Registration Dossier
Registration Dossier
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EC number: 231-959-5 | CAS number: 7782-50-5
Partition coefficient
Administrative data
Link to relevant study record(s)
Description of key information
The test is not applicable for chlorine as the organic phase will be oxidised immediately. For chlorine the log Pow was calculated to be - 0.85. For hypochlorous acid a log Pow was calculated to be - 0.87. Both values were calculated using KOWWIN v1.67.
Key value for chemical safety assessment
- Log Kow (Log Pow):
- -0.85
- at the temperature of:
- 20 °C
Additional information
Chlorine is soluble in water below pH 4. Above pH 4, chlorine reacts with water to form hypochlorous acid. Both, chlorine and hypochlorous acid have strong oxidising properties and will react with the organic octanol phase. An octanol/ water distribution equilibrium can therefore not be defined. As a consequence, neither the shake flask (OECD 107) nor the HPLC method (OECD 117) were technically feasible.
For chlorine, a log Pow was calculated to be: log Pow : - 0.85. For hypochlorous acid, a log Pow was calculated to be: log Pow : - 0.87. Both values were calculated using KOWWIN v1.67.
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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