|
Appearance
|
White crystalline powder or powder
|
|
Assay (argentometric)
|
99.5 - 100.5%
|
|
Insoluble matter
|
Max 0.005%
|
|
pH (1% solution in water)
|
5 - 7
|
|
Chloride (Cl)
|
Max 0.003%
|
|
Sulphate (SO4)
|
Max 0.001%
|
|
Total nitrogen (N)
|
Max 0.0005%
|
|
Heavy metal (as Pb)
|
Max 0.0005%
|
|
Iron (Fe)
|
Max 0.0005%
|
|
Calcium (Ca)
|
Max 0.005%
|
|
Sodium (Na)
|
Max 0.002%
|