|
Appearance
|
White to off-white powder
|
|
Assay
|
Min 97%
|
|
Heavy metal (as Pb)
|
Max 0.0005%
|
|
Substance insoluble in methanol
|
Max 0.1%
|
|
Substance insoluble in water
|
Max 0.1%
|
|
Iron (Fe)
|
Max 0.0005%
|
|
Chloride (Cl)
|
Max 0.01%
|
|
Calcium (Ca)
|
Max 0.05%
|
|
Substance not precipitated by dilute H2SO4 (as SO4)
|
Max 0.2%
|
|
Water
|
Max 4%
|