|
Appearance
|
Colourless deliquescent crystals
|
|
Assay
|
Min 98.0%
|
|
Insoluble matter
|
Max 0.001%
|
|
Reaction (10% solution)
|
pH 5.5-7.5
|
|
Residue on ignition
|
Max 0.01%
|
|
Chloride (Cl)
|
Max 0.001%
|
|
Sulphate (SO4)
|
Max 0.005%
|
|
Copper (Cu)
|
Max 0.0001%
|
|
Iron (Fe)
|
Max 0.0005%
|
|
Lead (Pb)
|
Max 0.0001%
|