Zinc Sulphate

Preparation

• Zinc sulphate can be prepared by reacting zinc metal, zinc oxide, or zinc carbonate with sulfuric acid:

  • Using zinc metal: Zn + H2SO4 → ZnSO4 + H2

  • Using zinc oxide: ZnO + H2SO4 → ZnSO4 + H2O

  • Using zinc carbonate: ZnCO3 + H2SO4 → ZnSO4 + CO2 + H2O

Properties

• A white, odorless, crystalline powder.

• Soluble in water.

• Commonly found as a heptahydrate (ZnSO₄·7H₂O), known as white vitriol.

Uses

1. Astringent: Used in lotions, eye drops, and creams.

2. Dietary Supplement: Treats zinc deficiency.

3. Agriculture: Used as a fertilizer to correct zinc-deficient soils.

4. Industrial Use: In the production of paints, inks, and other products.

Storage

• Store in a cool, dry place, away from heat, moisture, and incompatible materials.

• Keep in a tightly closed container to avoid contact with water and air.