|
Appearance
|
White crystalline powder
|
|
Assay (on anhydrous basis)
|
99 - 100.5%
|
|
Appearance of solution
|
Passes test
|
|
pH (5% solution in water)
|
7.0 - 9.0
|
|
Barium (Ba)
|
Max 0.005%
|
|
Chloride (Cl)
|
Max 0.05%
|
|
Fluoride (F)
|
Max 0.005%
|
|
Sulphate (SO4)
|
Max 0.1%
|
|
Heavy metal (as Pb)
|
Max 0.001%
|
|
Arsenic (As)
|
Max 0.0003%
|
|
Iron (Fe)
|
Max 0.002%
|
|
Lead (Pb)
|
Max 0.0002%
|
|
Water (H2O)
|
Max 7.0%
|
|
Matter insoluble in water
|
Max 0.3%
|
|
Formic acid, formates and other oxidizable impurities
|
Max 0.1%
|