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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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.
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EC number: 918-594-3 | CAS number: 7723-14-0
Water solubility
Administrative data
Link to relevant study record(s)
Description of key information
Insoluble
Below 0.3 mg/l at 20°C (stirring a 1mg/L suspension for 24 h)
Key value for chemical safety assessment
Additional information
The result of this solubility limit test corresponds to the physical solubility of red phosphorus and has to be distinguished from hydrolysis in water (see CSR 4.1.1.1).
Red phosphorus as such is physically insoluble in water due to its polymeric nature.
But suspending of red phosphorus in water leads to an immediately released removal of small amounts of water-soluble phosphorus oxyacids impurities (oxyacids) from the particle surface and a subsequent very slow continuous chemical reaction with water. Both effects are related to hydrolysis and not to the physical solubility of red phosphorus.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.
