| Customization: | Available |
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| CAS No.: | 7446-20-0 |
| Formula: | H14o11szn |
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Zinc sulfate heptahydrate, with the chemical formula ZnSO4·7H2O, commonly known as zinc sulfate or zinc sulfate, is an inorganic compound. It is a white crystalline powder, soluble in water, slightly soluble in ethanol, dehydrated when heated to 200°C, and decomposed at 770°C.
Physical properties
The physical properties of zinc sulfate heptahydrate include:
Appearance: colorless to white crystalline solid
Density: 1.957 g/cm³
Melting point: 100°C
Boiling point: 500°C
Solubility: soluble in 960 g/L water at 20°C, 663.6 at 100°C g/100ml water
Stability: easily soluble in water, slightly soluble in ethanol and glycerin, weathering in dry air
Chemical properties
The chemical properties of zinc sulfate heptahydrate include:
Dehydration upon heating: lose one molecule of crystal water when heated to 200°C, lose seven molecules of crystal water when heated to 280°C, and decompose into zinc oxide and sulfur trioxide at 767°C2
Toxicity: harmful if swallowed, serious damage to eyes, highly toxic to aquatic organisms, and may have long-term adverse effects on the aquatic environment
Uses
Zinc sulfate heptahydrate has a wide range of uses, including:
Mordant: used in the textile industry to fix dyes on fibers
Wood preservative: prevent wood from decaying and being infested with insects
Papermaking industry: as a bleaching agent and enhancer
Medicine: used in medical emetics and fungicides
Agriculture: as a trace element fertilizer to promote plant growth
Preparation method
Zinc sulfate heptahydrate can be prepared by the following methods:
Waste battery preparation: peel off the zinc skin of the battery and wash it, add concentrated sulfuric acid to heat and evaporate and crystallize to obtain zinc sulfate heptahydrate2
Industrial production: prepared by pulverizing, removing iron, acidifying and other steps of zinc oxide ore (mainly composed of ZnO) 4
Zinc sulfate heptahydrate has a wide range of applications in industry and agriculture and is an important inorganic compound.
| Name of index | FCCVII | Index |
| Content % | 99.0-108.7 | 99.48 |
| Alkali metal≤% | 0.5 | 0.19 |
| PH Value | normal | normal |
| Cd ≤% | 0.0002 | <0.0002 |
| Pb ≤% | 0.0004 | <0.0002 |
| Hg ≤% | 0.0005 | <0.0005 |
| Se ≤% | 0.003 | 0.002 |
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