Iron(Ⅱ)Sulfate,heptahydrate
Molecular formula:FeSO4·7H2O Molecular weight:278.01
Alias: green alum, iron alum.
Properties]: Light blue-green crystals or particles, odourless, soluble in water, slightly soluble in alcohol, aqueous solution is easily oxidised, corrosive, easy to weather in dry air, and then easy to oxidise to alkaline high iron sulphate in humid air and become yellow. Relative density 1.897, melting point 64 ℃, 56.6 ℃ when the salt tetrahydrate, 65 ℃ into a salt monohydrate, 300 ℃ into a white powder anhydrous, temperature to 480 ℃ began to decompose.
Table 1
| Test item | Analytical purity | Chemical purity | Specified grade |
|
Content /% |
99.0-101.0 |
98.0-101.0 |
According to customers' requirements
|
|
Water Insoluble Matter /% |
≤0.005 |
≤0.02 |
|
|
Chloride((Cl) /% |
≤0.001 |
≤0.005 |
|
|
Total Nitrogen/% |
≤0.001 |
- |
|
|
Phosphate(PO4) /% |
≤0.000 5 |
≤0.002 |
|
|
Arsenic(As) /% |
≤0.000 2 |
≤0.000 2 |
|
|
Manganese(Mn) /% |
≤0.05 |
- |
|
|
High iron(Fe) /% |
≤0.02 |
≤0.10 |
|
|
Copper(Cu) /% |
≤0.002 |
≤0.01 |
|
|
Zinc(Zn) /% |
≤0.005 |
≤0.02 |
|
|
Lead(Pb) /% |
≤0.002 |
≤0.005 |
|
|
Ammonia non-precipitates (sulphate) /% |
≤0.05 |
≤0.2 |
TABLE2
| Test item | Analytical purity | Specified grade |
| Content /% |
≥99.0 |
According to customers' requirements
|
|
Fe2+ /% |
≥19.5 |
|
|
Fe3+ /% |
≤0.05 |
|
|
Water Insoluble Matter /% |
≤0.005 |
|
|
(Mn) /ppm |
≤50 |
|
|
(Cu) /ppm |
≤15 |
|
|
(Ca) /ppm |
≤25 |
|
|
(Mg) /ppm |
≤50 |
|
|
(Zn) /ppm |
≤40 |
|
|
(Pb) /ppm |
≤15 |
|
|
(Cd) /ppm |
≤15 |
|
|
(Cr) / ppm |
≤70 |
|
|
(Si) / ppm |
≤20 |
|
|
(Al) /ppm |
≤20 |
|
|
(Ti) / ppm |
≤15 |
|
|
(Ni) /ppm |
≤30 |
|
|
(Co) /ppm |
≤50 |
|
|
(Na) /ppm |
≤20 |
|
|
pH(5%solution，25℃) |
3.0-3.6 |
|
|
Oil content /% |
≤0.001 |
|
|
Magnetic substance /ppm |
≤300 |
|
table3
| Tested Items | Excipients | High purity | Feed grade | pecified grade |
|
Content /% |
98.5-104.0 |
99.5-104.5 |
≥98.0 |
According to customers' requirements |
|
(Cl) /ppm |
≤300 |
- |
- |
|
|
(As) /ppm |
≤2 |
≤3 |
≤2 |
|
|
(Pb) /ppm |
≤20 |
≤2 |
≤20 |
|
|
PH(5%solution，25℃) |
3.0-4.0 |
- |
- |
|
|
(Hg) /ppm |
≤3 |
≤1 |
- |
|
|
(Fe) /% |
≥19.7 |
- |
≥19.7 |
|
table4
| Tested Items | Industrial grade | Liquid | Specified Grade |
|
Content /% |
≥90.0 |
10-30 |
According to customers' requirements |
|
(TiO2) /% |
≤0.75 |
- |
|
|
no solution /% |
≤0.5 |
≤0.5 |
|
|
(以H2SO4计) /% |
≤1.0 |
- |
|
|
(As) /% |
≤0.000 2 |
- |
|
|
(Pb) /% |
≤0.000 4 |
- |
|
|
(Cd) /% |
≤0.000 1 |
- |
|
|
(Hg) /% |
≤0.000 02 |
- |
|
|
(Cr) /% |
≤0.001 |
- |
Uses]: Used in the production of sodium batteries and lithium battery cathode materials, iron phosphate raw materials; used as an analytical reagent, the determination of platinum, selenium, nitrate, nitrite, etc.; also used for photographic plates, ferrite raw materials and iron fortification; agriculture can be used as a pesticide and fertiliser, can prevent and control the black spike disease of wheat, apple and pear scab disease, fruit tree rot, but also a micronutrient fertilizer, with the acceleration of rice, sugar beet, etc., the return of green, adjust the soil pH value of iron to plant supplement, remove moss and lichen; the manufacture of magnetic iron oxide red and iron oxide blue inorganic pigments and high-end polymerization of iron sulfate It is also a kind of trace element fertilizer, which can accelerate the regrowth of rice, sugar beet, etc., regulate the pH value of soil, add iron to plants, and remove the moss and lichen from the trunks of trees; it is also the raw material for the manufacture of magnetic iron oxide, inorganic pigment of iron oxide red and iron blue, iron catalyst and high end ferric sulfate; it is used as a local astringent and blood tonic in pharmaceutical excipients; it is used as a nutritive enhancer in the foodstuffs at high purity grade, such as iron enrichment agent, fruit and vegetable colour enhancer; it is also used as the iron suppliment in feedstuffs; and it is also used as the iron water treatment agent in the water treatment industry. It is used as the raw material of iron water treatment agent in the industry, and can also be directly used in industrial water, wastewater and sewage.