|
Appearance
|
White light powder
|
|
Assay (acidimetric)
|
Min 96%
|
|
Calcium carbonate (as CaCO3)
|
Max 3.0%
|
|
Substance insoluble in HCl
|
Max 0.1%
|
|
Chloride (Cl)
|
Max 0.03%
|
|
Sulphate (SO4)
|
Max 0.1%
|
|
Heavy metal (as Pb)
|
Max 0.005%
|
|
Iron (Fe)
|
Max 0.05%
|
|
Substance not precipitated by ammonium oxalate (as SO4)
|
Max 2.5%
|