|
Appearance
|
White crystalline powder
|
|
Assay (argentometric)
|
Min 99.5%
|
|
Insoluble matter (13.33% in water)
|
Max 0.005%
|
|
pH (5% solution in water; 25°C)
|
4.5-6.0
|
|
Residue on ignition
|
Max 0.01%
|
|
Bromate (BrO3)
|
Max 0.002%
|
|
Chloride (Cl)
|
Max 0.2%
|
|
Iodide (I)
|
Max 0.005% (Passes ACS test)
|
|
Sulphate (SO4)
|
Max 0.005%
|
|
Barium (Ba)
|
Max 0.002%
|
|
Iron (Fe)
|
Max 0.0005%
|
|
Heavy metal (as Pb)
|
Max 0.0005%
|