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Test |
Limit |
Assay |
99.5 % min. |
Solubility |
Freely Soluble in water, practically insoluble in ethanol (96 %). |
Appearance of solution (20 % w/v solution) |
Solution is clear and not more intensely colored than reference color solution Y6 |
Identification |
|
(A) By Color |
A: 10 % solution is strongly alkaline. |
(B) Reaction Of carbonates |
B: It gives reaction of Carbonate |
(C) Reaction of Sodium |
C: It gives reaction of Sodium. |
(D) LOD |
D: It complies with limit test of Loss on drying |
Silicate |
NMT 0.0025% |
Calcium (Ca) |
NMT 0.03% |
Phosphate (PO4) |
NMT 0.001% |
Loss on Drying at 285 C |
1% Max |