|
Appearance
|
White crystalline powder
|
|
Assay (by HClO4 titration; on dried basis)
|
99.0 - 100.5%
|
|
Appearance of solution
|
Passes test
|
|
Insoluble matter in water
|
Max 0.025%
|
|
Acidity or alkalinity
|
Passes test
|
|
Chloride (Cl)
|
Max 0.005%
|
|
Oxalate (as C2H2O4)
|
Max 0.03%
|
|
Sulphate (SO4)
|
Max 0.01%
|
|
Heavy metal (as Pb)
|
Max 0.001%
|
|
Arsenic (As)
|
Max 0.0002%
|
|
Sodium (Na)
|
Max 0.3%
|
|
Readily carbonisable substance
|
Passes test
|
|
Water (H2O)
|
4.0 - 7.0%
|