Registration Dossier
Registration Dossier
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EC number: 232-190-8 | CAS number: 7789-79-9
Dissociation constant
Administrative data
Link to relevant study record(s)
Description of key information
Titration curve of both Ca and hypophosphite ions.
Key value for chemical safety assessment
- pKa at 20°C:
- 12.6
Additional information
No dissociation constant was measured for hypophosphite ion. Calcium ion has got a pKa = 12.6, i.e. very alcaline.
This means that both ions are very stable in a large pH range. Only at very high pH minor precipitation of Ca(OH)2 may occur.
Dissolution of Calcium hypophosphite in water does not affect the pH of the solution.
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