| Synonyms | Calcium aluminosilicate, calcium silicoaluminate, aluminium calcium silicate |
| Definition | |
| Chemical name | Calcium aluminium silicate |
| Assay | Content on the anhydrous basis:
as SiO2 not less than 44,0 % and not more than 50,0 %
as Al2O3 not less than 3,0 % and not more than 5,0 %
as CaO not less than 32,0 % and not more than 38,0 %
|
| Description | Fine white, free-flowing powder |
| Identification | |
A. Positive tests for calcium, for aluminium and for silicate | |
| Purity | |
| Loss on drying | Not more than 10,0 % (105 oC, 2h) |
| Loss on ignition | Not less than 14,0 % and not more than 18,0 on the anhydrous basis (1 000 oC, constant weight) |
| Fluoride | Not more than 50 mg/kg |
| Arsenic | Not more than 3 mg/kg |
| Lead | Not more than 10 mg/kg |
| Mercury | Not more than 1 mg/kg |