|
Appearance
|
White crystalline powder
|
|
Assay (argentometric)
|
Min 98.5%
|
|
Insoluble matter
|
Max 0.005%
|
|
pH (5% solution in water; 25°C)
|
4.5-6.0
|
|
Chloride (Cl)
|
Max 0.005%
|
|
Sulphate (SO4)
|
Max 0.005%
|
|
Heavy metal (as Pb)
|
Max 0.0005%
|
|
Iron (Fe)
|
Max 0.0003%
|
|
Residue on ignition (as SO4)
|
Max 0.025%
|
|
Iodine consuming substances
|
Max 0.004 meq/g
|