|
Appearance
|
White crystalline powder
|
|
Assay
|
Min 99.5%
|
|
Specific optical rotation ([α]20/D)
|
+12.0° to +12.8°
|
|
Chloride (Cl)
|
Max 0.002%
|
|
Sulphate (SO4)
|
Max 0.015%
|
|
Oxalate (as C2H2O4)
|
Max 0.05%
|
|
Heavy metal (as Pb)
|
Max 0.001%
|
|
Copper (Cu)
|
Max 0.001%
|
|
Zinc (Zn)
|
Max 0.001%
|
|
Arsenic (As)
|
Max 0.0001%
|
|
Loss on drying (at 105°C)
|
Max 0.5%
|
|
Sulphated ash
|
Max 0.05%
|