|
Appearance
|
White crystalline powder
|
|
Assay (on anhydrous basis)
|
Min 99.5%
|
|
Insoluble matter
|
Max 0.005%
|
|
Loss on drying (at 110°C)
|
Max 0.2%
|
|
Chloride (Cl)
|
Max 0.002%
|
|
Phthalic acid
|
Max 0.005%
|
|
Sulphate (SO4)
|
Max 0.005%
|
|
Copper (Cu)
|
Max 0.0005%
|
|
Iron (Fe)
|
Max 0.0005%
|
|
Lead (Pb)
|
Max 0.0005%
|
|
Sodium (Na)
|
Max 0.01%
|