|
Appearance
|
White crystalline powder
|
|
Assay (by HClO4 titration)
|
99.0-101.0%
|
|
Identification
|
Passes test
|
|
Solubility
|
Passes test
|
|
Appearance of solution
|
Passes test
|
|
pH (5 % solution)
|
5.9-6.3
|
|
Insoluble matter in water
|
Max 0.005%
|
|
Hydrolizable substance
|
Passes test
|
|
Substance darkened by H2SO4
|
Passes test
|
|
Chloride (Cl)
|
Max 0.003%
|
|
Heavy metal (as Pb)
|
Max 0.001%
|
|
Sulphate (SO4)
|
Max 0.005%
|
|
Loss on drying (at 105°C)
|
Max 0.2%
|
|
Residue on ignition
|
Max 0.05%
|
|
Ammonium (NH4)
|
Max 0.005%
|
|
Iron (Fe)
|
Max 0.001%
|
|
Arsenic (As)
|
Max 0.0001%
|
|
Copper (Cu)
|
Max 0.0005%
|
|
Nickel (Ni)
|
Max 0.0005%
|
|
Lead (Pb)
|
Max 0.0005%
|