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Ferrous Sulfate 7 Hydrate ACS [Iron (II) Sulfate]
| Mol. Formula | FeSO4. 7H2O | | Mol. weight | 278.02 | | CASR No. | 7782-63-0 | | Appearance | Greenish-blue crystalline powder | | Test solution (10% w/v solution in dist. water+ 1ml H2SO4) | The solution shall be clear and pale greenish-blue | | Assay | 99.0 - 102.0% | | pH (5% w/v solution in dist. water) | 3.0 - 4.0 | Maximum limits of impurities
| | Insoluble matter | 0.01% | | Chloride, as Cl | 0.001% | | Phosphate, as PO4 | 0.001% | | Copper, as Cu | 0.005% | | Ferric, as Fe+3 | 0.1% | | Manganese, as Mn | 0.05% | | Substances not precipitated by ammonium hydroxide | 0.05% | | Zinc, as Zn | 0.005% |
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