Factory 99% 7446-20-0 Flotation Reagents Zinc Sulfate Heptahydrate Powder

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.

Zinc sulphate is usually used to supply the needed amount of zinc when dry fertilizer materials are used. This material can be either broadcast and incorporated before planting, or used in a starter fertilizer. It blends well with other dry fertilizer materials.