|
Appearance
|
A fine white powder
|
|
Assay
|
99.0-100.5%
|
|
Heavy metal (as Pb)
|
Max 0.002%
|
|
Iron (Fe)
|
Max 0.02%
|
|
Arsenic (As)
|
Max 0.0003%
|
|
Antimony (Sb)
|
Max 0.005%
|
|
Acid soluble matter (HCl 0.5 mol/L)
|
Max 0.5%
|
|
Water soluble matter
|
Max 0.5%
|
|
Loss on drying (at 105°C)
|
Max 0.5%
|
|
Loss on ignition (at 1000°C)
|
Max 0.5%
|