Dried Ferrous Sulphate
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CAS NO: 7720-78-7
MOLECULAR FORMULA :- FeSO4
MOLECULAR WEIGHT :- 151.91 g/mol
| SPECIFICATION | IP | BP | USP |
| Description | Grayish white to buff colored powder. | Grayish white powder. | Grayish white powder. |
| Solubility | – | Slowly but freely soluble in water. Very soluble in boiling water, practically insoluble in ethanol (96%) | – |
| pH | – | 3.0-4.0 | – |
| Identification
(A) Reaction (B) Reaction (C) Assay |
A. Reaction of sulfates
B. Reaction of Ferrous Salt |
A. Reaction of sulfates
B. Reaction of Irons C. It complies with limit of assay. |
A. Reaction of sulfates
B. Reaction of Ferrous Salt
|
| Chloride | – | NMT 300 ppm | – |
| Insoluble Substances | – | – | NMT 0.05 % |
| Basic sulphate | Producing solution that is not more than faintly turbid. | – | – |
| Arsenic | NMT 3 ppm | – | NMT 3 ppm |
| Lead | NMT 50 ppm | – | NMT 10 ppm |
| Mercury | – | – | It meets the requirements of the test for mercury |
| Chromium | – | NMT 100 ppm | – |
| Copper | NMT 50 ppm | NMT 50 ppm | – |
| Ferric ions | – | NMT 0.5 % | – |
| Manganese | NMT 0.1 % | NMT 0.1 % | – |
| Nickel | – | NMT 100 ppm | – |
| Zinc | NMT 500 ppm | NMT 100 ppm | – |
| Organic volatile impurities | – | – | Meets the requirements. |
| Residual Solvents | – | – | Meets the requirements. |
| Assay | 86.0 % – 90.0 % | 86.0 % – 90.0 % | 86.0 % – 89.0 % |
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