|
Appearance
|
White crystalline powder
|
|
Assay (by HClO4 titration)
|
99 - 100.5%
|
|
Identity
|
Passes test
|
|
Appearance of solution (100 g/L)
|
Clear and colorless
|
|
Insoluble matter
|
Max 0.005%
|
|
Acidity or alkalinity
|
Passes test
|
|
pH (50 mg/mL in water; 25°C)
|
7.5 - 9.0
|
|
Chloride (Cl)
|
Max 0.003%
|
|
Sulphate (SO4)
|
Max 0.005%
|
|
Heavy metals (by ICP-OES)
|
Max 0.0005%
|
|
Iron (Fe)
|
Max 0.0005%
|
|
Oxalate (as C2H2O4)
|
Max 0.01%
|
|
Tartarate (C4H6)
|
Passes test
|
|
Readily carbonisable substance
|
Passes test
|
|
Ammonium (NH4)
|
Max 0.003%
|
|
Calcium (Ca)
|
Max 0.005%
|
|
Water (by KF)
|
11.0 - 13.0%
|
|
Loss on drying (180°C; 18 hrs)
|
10.0 - 13.0%
|