Zinc sulfate heptahydrate (ZnSO4•7H2O)-Lump

Characteristic

Zinc sulfate is an inorganic compound and dietary supplement. As a supplement it is used to treat zinc deficiency and to prevent the condition in those at high risk.Side effects of excess supplementation may include abdominal pain, vomiting, headache, and tiredness.It has the formula ZnSO₄ as well as any of three hydrates. It was historically known as "white vitriol". All of the various forms are colourless solids. The heptahydrate form is commonly encountered.

Chemical formula:ZnSO₄

Molar mass: 161.47 g/mol (anhydrous);179.47 g/mol (monohydrate);287.53 g/mol (heptahydrate)

Appearance: white powder

Odor: odorless

Density: 3.54 g/cm³ (anhydrous);2.072 g/cm³ (hexahydrate)

Melting point: 680 °C (1,256 °F; 953 K) decomposes (anhydrous);100 °C (heptahydrate);70 °C, decomposes (hexahydrate)

Boiling point: 740 °C (1,360 °F; 1,010 K) (anhydrous);280 °C, decomposes (heptahydrate)

Solubility in water:57.7 g/100 mL, anhydrous (20 °C) (In aqueous solutions with a pH < 5)

Solubility alcohols

Magnetic susceptibility (χ):−45.0·10⁻⁶ cm³/mol

Refractive index (nD):1.658 (anhydrous), 1.4357 (heptahydrate)

Application

Zinc sulfate heptahydrate is widely used as a coagulant in the production of rayon. It finds an application in the manufacturing of calico printing, wood preservation and lithopone. It is the source of zinc which is supplied in animal feeds, fertilizers and agricultural sprays. It is utilized as electrolytes for zinc plating and surface treating agents. It is also used as a mordant in dyeing, preservative for skin and leather and in medicine as an astringent and emetic.