molecular formula: FeSO4·7H2O
CAS: 7782-63-0
Appearance:
Light blue green crystal
Properties:
Glaucous crystallization. The relative density 1.897, melting point ℃ into four 64 when water and salt, salt water into ℃ when 65. In the wet air oxidation as alkali type sulphuric acid easy high iron into yellow. Soluble in water, insoluble in alcohol. Aqueous easy oxidation.
Use:
Analytics reagents. DTC, polymerization catalysts. Also used in photoengraving, medium preparation.
Details:
|
Test item |
Specification |
|
Reagent grade |
Pharmaceutical grade |
|
Appearance |
Conform |
Conform |
|
Assay /% |
≥99.0-101.0 |
≥98.0-101.0 |
|
Water insoluble /% |
≤0.005 |
≤0.02 |
|
Chloride (Cl)/% |
≤0.001 |
≤0.005 |
|
N/% |
≤0.001 |
－ |
|
Phosphate (PO4)/% |
≤0.0005 |
≤0.002 |
|
Arsenic (As)/% |
≤0.0002 |
≤0.0002 |
|
Manganese (Mn)/% |
≤0.05 |
－ |
|
Ferric (Fe)/% |
≤0.02 |
≤0.10 |
|
Copper (Cu)/% |
≤0.002 |
≤0.01 |
|
Zinc (Zn)/% |
≤0.005 |
≤0.02 |
|
Lead (Pb)/% |
≤0.002 |
≤0.005 |
|
Ammonia not sediment /% |
≤0.05 |
≤0.2 |
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