granules of greenish-yellow.
as the slack in dyeing, as a coagulant for industrial wastes, electroplating for etching aluminum and steel, in pigments, for the treatment of drinking water and wastewater.
| Fe(Fe3+), % | 19,5 ± 1,0 |
| Fe(Fe2+), % | less 1,0 |
| Free acid (H2SO4) | less 1,5 |
| SO4, % | 54,0 ± 2,0 |
| pH | less 2,0 |
| Bulk density, g/cm3 | near 1,2 |
| Water-insoluble substance,%, not more | 1,0 |
| Trace elements, mg / kg, no more than: | |
| Arsenic | 0,2 |
| Cadmium | 0,1 |
| Chrome | 20 |
| Nickel | 0,1 |
| Mercury II | 50 |
| Plumbum | 5 |
| Selenium | 1,0 |
| Particle size, mm: | |
| 95 % | 1,0-3,0 |
| < 3 % | less 0,2 |
| < 1 % | more 5 |
Iron sulphate 9-water has a different name - Ferrum sulfate III 9-water
In aqueous solutions it acquires a reddish-brown tinge.
In nature it is in the form of a Cokimbite crystal. On the surface, the natural mineral is not stable.
An interesting fact - ferrous sulphate is discovered by one of the research rovers on the surface of Mars. Due to the low density of this material, having driven on it, the Mars rover got stuck.
The main application is in metallurgy and as a coagulant for industrial waste.
One of the methods of preparation is the interaction of iron sulfate II or iron sulphide with nitric acid.
The product is hygroscopic - it absorbs moisture from the air - spreads out in the open air.
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