| Assay: | 98.0-101.0% MnSO4 · H2O |
| Loss on ignition: | 10.0-12.0% |
| Substances reducing permanganate: | Passes test |
| MAXIMUM ALLOWABLE | |
| Insoluble matter: | 0.01% |
| Chloride (Cl): | 0.005% |
| Calcium (Ca): | 0.005% |
| Magnesium (Mg): | 0.005% |
| Nickel (Ni): | 0.02% |
| Potassium (K): | 0.01% |
| Sodium (Na): | 0.05% |
| Zinc (Zn): | 0.005% |
| Heavy metals (as Pb): | 0.002% |
| Iron (Fe): | 0.002% |