|
Appearance
|
A white crystalline powder
|
|
Assay
|
Min. 98.0%
|
|
Insoluble matter
|
Max 0.005%
|
|
Carbonate
|
Max 0.2%
|
|
Sulphide (S)
|
Max 0.001%
|
|
Chloride (Cl)
|
Max 0.01%
|
|
Iron (Fe)
|
Max 0.0002%
|
|
Heavy metal (as Pb)
|
Max 0.0005%
|
|
Ammonia (NH4)
|
Max 0.002%
|
|
Sulphate (SO4)
|
Max 0.01%
|