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Appearance
|
White crystalline powder
|
|
Assay
|
99 - 100.5%
|
|
Identity
|
Passes test
|
|
Solubility
|
Freely soluble in water, practically insoluble in alcohol
|
|
Appearance of solution
|
5% solution in water is clear and colourless
|
|
Acidity
|
Passes test
|
|
Arsenic (As)
|
Max 0.0014%
|
|
Lead (Pb)
|
Max 0.002%
|
|
Iron (Fe)
|
Max 0.003%
|
|
Alkalies and alkaline earths (as SO4)
|
Max 0.9%
|
|
Loss on drying (at 105°C)
|
Max 1.0%
|