|
Appearance
|
White crystalline powder
|
|
Assay (Titration after Ion exchange)
|
99 - 100.5%
|
|
Identity (acc. to pharmacopoeias)
|
Passes test
|
|
Appearance of solution
|
Passes test
|
|
Reducing substance
|
Passes test
|
|
pH (5% solution in water; 20°C)
|
4.5 - 8.5
|
|
Acidity or alkalinity
|
Passes test
|
|
Chloride (Cl)
|
Max 0.001%
|
|
Chlorate and perchlorate (as Cl)
|
Passes test
|
|
Sulphate (SO4)
|
Max 0.003%
|
|
Phosphate (PO4)
|
Max 0.0005%
|
|
Lead (Pb)
|
Max 0.0005%
|
|
Arsenic (As)
|
Max 0.0003%
|
|
Iron (Fe)
|
Max 0.0003%
|
|
Calcium (Ca)
|
Max 0.001%
|
|
Sodium (Na)
|
Max 0.02%
|
|
Ammonium (NH4)
|
Max 0.001%
|
|
Iodate (IO3)
|
Max 0.0005%
|
|
Nitrite (NO2)
|
Max 0.0005%
|
|
Loss on drying (at 105°C)
|
Max 0.5%
|