White crystalline powder | Complying |
Assay (T) | 99-101%w/w |
Calcium (Ca) | <= 0.005% |
Chloride (Cl) | <= 0.003% |
Heavy metals (as Pb) | <= 0.0005% |
Iron (Fe) | <= 0.0005% |
Sulfate (SO4) | <= 0.005% |
Loss on drying (160°C) | 11-13% |
pH (5% in water) | 7-9 |
Insoluble matter | <= 0.005% |