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Appearance
|
White crystalline powder
|
|
Assay (on anhydrous basis)
|
Min 99%
|
|
pH (5% solution in water)
|
8.7 - 9.3
|
|
Insoluble matter
|
Max 0.01%
|
|
Chloride (Cl)
|
Max 0.002%
|
|
Nitrogen compounds (as N)
|
Max 0.002%
|
|
Sulphate (SO4)
|
Max 0.005%
|
|
Copper (Cu)
|
Max 0.001%
|
|
Iron (Fe)
|
Max 0.001%
|
|
Lead (Pb)
|
Max 0.001%
|
|
Potassium (K)
|
Max 0.01%
|
|
Loss on drying (at 130°C)
|
Max 5.0%
|