Registration Dossier
Registration Dossier
Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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.
Use of this information is subject to copyright laws and may require the permission of the owner of the information, as described in the ECHA Legal Notice.
EC number: 231-959-5 | CAS number: 7782-50-5
Water solubility
Administrative data
Link to relevant study record(s)
Description of key information
Solubility of chlorine in pure water is determined to be 9.78 g/L at 10°C, 7.41 g/L at 20°C and 5.91 g/L at 30°C. All values are given for a pH of approximately 7.
Key value for chemical safety assessment
- Water solubility:
- 7 410 mg/L
- at the temperature of:
- 20 °C
Additional information
The solubility of chlorine in pure water is complicated by two factors:
1. Chlorine reacts chemically with water, hydrolysing to form HCl and HClO. This effect increase at pH above 4.
2. At relatively low temperature and at pressures near to atmospheric, chlorine forms a hydrate which separates out. For the solubilities, it is assumed that all of the chlorine-containing species are present.
Solubility of chlorine in pure water is determined to be 9.78 g/L at 10°C, 7.41 g/L at 20°C and 5.91 g/L at 30°C. All values are given for a pH of approximately 7.
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.
Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
