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Appearance
|
White or pale pink, slightly hygroscopic, crystalline powder
|
|
Assay (on anhydrous basis)
|
98.0 - 102.0%
|
|
Water content
|
3.0 - 9.0%
|
|
Sulphate (SO4)
|
Max. 0.2%
|
|
Chloride (Cl)
|
Max. 0.05%
|
|
Lead (Pb)
|
Max. 0.001%
|
|
Heavy metal (as Pb)
|
Max. 0.002%
|
|
Reducing substance
|
Max. 1.0%
|