|
Appearance
|
White to off white crystals or powder
|
|
Assay (on anhydrous basis)
|
Min 99%
|
|
Identity (IR)
|
Conforms to structure
|
|
Acid insoluble impurities
|
Passes test
|
|
Alkali insoluble impurities
|
Passes test
|
|
Melting range
|
163-166°C
|
|
Sulphate (SO4)
|
Max 0.02%
|
|
Chloride (Cl)
|
Max 0.01%
|
|
Heavy metal (as Pb)
|
Max 0.002%
|
|
Loss on drying (at 105°C)
|
Max 0.5%
|
|
Sulphated ash
|
Max 0.1%
|