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. |