The color of ferrous sulfate heptahydrate is green, monoclinic crystal or particle, no odor, relative density 1.898, melting point 64ºC. Easily soluble in water, (48.6g/100ml water at 50ºC) red heat decomposition to form ferric trioxide, soluble in glycerol, insoluble in ethanol, corrosive, in dry air will be weathered. At 56.6ºC, the heptahydrate is transformed into tetrachlates, and at 64.6ºC, it becomes monohydrate. At 90ºC, six crystalline water is lost, and at 300ºC, all crystalline water is lost to form anhydrous substance. At red heat, SO2 and SO3 are decomposed and released. It's corrosive. It fluoresces in dry air. The anhydrous substance is a white powder, but when it is mixed with water it turns blue-green.
Iron(II) sulfate or ferrous sulfate denotes a range of salts with the formula Fe SO4·xH2O. These compounds exist most commonly as the heptahydrate (x = 7) but several values for x are known. The hydrated form is used medically to treat iron deficiency, and also for industrial applications. Known since ancient times as copperas and as green vitriol , the blue-green heptahydrate (hydrate with 7 molecules of water) is the most common form of this material. All the iron(II) sulfates dissolve in water to give the same aquo complex [Fe(H2O)6]2+, which has octahedral molecular geometry and is paramagnetic. The name copperas dates from times when the copper(II) sulfate was known as blue copperas, and perhaps in analogy, iron(II) and zinc sulfate were known respectively as green and white copperas.
| Item |
Specification |
Result |
| Purity of Feso4.7H2O |
Min 95% |
95.1% |
| Total Fe(as Fe) |
Min19.3% |
19.51% |
| Lead (as Pb) |
20ppm max. |
13ppm |
| Arsenic(as As) |
2ppm max. |
0.7ppm |
| Heavy metal (as Cd) |
4ppm max. |
1.1ppm |
| Sulfur(as S) |
12 max. |
10% |
1.Nutritional Supplement. Together with other iron compounds,ferrous sulphate is used to fortify foods and treat irondeficiency anemia.Constipation is a frequent and uncomfortable side effect associatedwith the administration of oral supplements.Stool softeners often are bprescribed to prevent constipa tion.
2.Water effluent treatment system. It's used for purification of drinking water and wastewater treatment by settling of impurities by means of precipitation and flocculation.
3.Paper Industry. It helps in sizing of paper at neutral and alkaline pH, thus improving paper quality (reducing spots and holes and improving sheet formation and strength) and sizing efficiency.
4. Textile Industry. It is used for color fixing in Naphthol based dyes for cotton fabric.
5. Other Uses. Leather tanning, lubricating compositions, fire retardants; decolorizing agent in petroleum, deodorizer; food additive; firming agent; dyeing mordant; foaming agent in firefighting foams; fireproofing cloth; catalyst; pH control; waterproofing concrete; aluminum compounds, zeolites
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