USP40.
Identification |
Conforming to the requirements |
Characteristics |
White crystalline or granular powder |
Assay |
98.5-102.0% |
Reducing substances |
1.0% Max. |
Loss on drying |
2.0% Max. |
Chloride |
0.07% Max. |
Sulphate |
0.05% Max. |
Arsenic |
3ppm Max. |
Heavy metals |
20ppm Max. |