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Appearance
|
Hygroscopic white crystalline powder or granules
|
|
Assay (after drying at 300°C)
|
99.5 - 100.5%
|
|
Insoluble matter
|
Max 0.01%
|
|
Loss on drying (at 300°C)
|
Max 0.5%
|
|
Sulphur compounds (as SO4)
|
Max 0.004%
|
|
Chloride (Cl)
|
Max 0.002%
|
|
Phosphate (PO4)
|
Max 0.001%
|
|
Silicate (SiO2)
|
Max 0.005%
|
|
Calcium (Ca)
|
Max 0.001%
|
|
Iron (Fe)
|
Max 0.0005%
|
|
Magnesium (Mg)
|
Max 0.0005%
|
|
Sodium (Na)
|
Max 0.02%
|
|
Heavy metals (by ICP-OES)
|
Max 0.0005%
|