Ferrous sulfate
Key words:
Ferrous sulfate
Classification:
- Details
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Ferrous sulfate is also known as soap alum, green alum, black alum. Sulfate of divalent iron. Dull blue-green monoclinic crystal system crystalline powder or particles. Odorless, with a salty astringent taste. Weathering in dry air. Easily oxidized to brownish-yellow alkaline iron sulfate in humid air. 10% aqueous solution is acidic to litmus (Ph value about 3.7). Heating to 70 ~ 73 ° C to lose 3 molecules of water, to 80 ° C to 123 ° C to lose 6 molecules of water, to 156 ° C or more into alkaline iron sulfate. Easily soluble in water (1g/1.5ml, 25℃ or 1g/0.5ml boiling water), insoluble in ethanol. Mainly used in pesticides, pigments, medicine, etc., in addition to chromatographic analysis reagents and so on.
Product Indicators
Item
Technical indicators
Superior Grade
First-rate
Second-rate
Ferrous sulfate (FeSO4.7H2O) content,% ≥ 98.0
94.0
90.0
Content of titanium dioxide (TiO2), % ≤ 0.5
0.5
0.75
Water insoluble matter content, % ≤ 0.2
0.5
0.75
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