Registration Dossier
Registration Dossier
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EC number: 232-379-5 | CAS number: 8011-76-5 Substance obtained by treating phosphate rock with sulfuric acid or a mixture of sulfuric and phosphoric acids. Composed primarily of calcium phosphates and calcium sulfate.
Water solubility
Administrative data
Link to relevant study record(s)
Description of key information
The water solubility of the substance is based on handbook/data base data on calcium sulfate and calcium phosphates. Calcium phosphate monobasic monohydrate is soluble in water. Calcium sulfate anhydrous is soluble in case of granular or powdered form and is soluble in water as dihydrate. Combining the data with substance's composition, it was concluded that the substance is soluble in water.
Key value for chemical safety assessment
- Water solubility:
- 1 g/L
Additional information
Calcium phosphate monobasic monohydrate is moderately soluble in water (Merck Index);
Calcium dihydrogen phosphate monohydrate is soluble in water (CRC Handbook);
Calcium phosphate monobasic is slightly soluble in water (Sax);
Calcium dihydrogen phosphate monohydrate is very soluble in water (18 g/L) (CRC Handbook, IUCI data base).
Calcium sulfate anhydrous is insoluble (crystal structure as the mineral) or soluble (granular or powder) in water (Merck Index);
Calcium sulfate is slightly soluble in water, calcium sulfate dihydrate is soluble in water (2 g/l at 20°C) (CRC Handbook);
Calcium sulfate is slightly soluble in water (Sax).
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