Registration Dossier
Registration Dossier
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EC number: 232-190-8 | CAS number: 7789-79-9
Hydrolysis
Administrative data
Link to relevant study record(s)
Description of key information
Waiving
Key value for chemical safety assessment
Additional information
Even though there is no adaptation rules in Annex VIII, column 2 of REACH Regulation (EC n. 1907/2006), the hydrolysis is waived for Ca(H2PO2)2.
Hypophosphite ion has no hydrolysable group and therefore testing for hydrolysis is scientifically unjustified.
Calcium may react according to: Ca2+ + 2H2O -> Ca(OH)2 + 2H+
The study performed to analyse the dissociation constant demonstrates that the Calcium is stable as ion up to pH 12.6 and therefore any hydrolysis is unlikely.
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