Zinc Oxide (ZnO): Description, Properties, and Applications
Zinc Oxide (ZnO) is an inorganic compound that appears as a colorless crystalline powder or hexagonal crystals. It is insoluble in water but turns yellow when heated. Naturally, it occurs as the mineral zincite.
Key Properties of Zinc Oxide:
✅ Chemical Formula: ZnO
✅ Molar Mass: 81.38 g/mol
✅ Density: 5.61 g/cm³
✅ Melting Point: 1975°C
✅ Boiling Point: 2360°C
✅ Solubility: Insoluble in water, but dissolves in acids and alkalis.
✅ Toxicity: Practically non-toxic but inhalation of dust may cause irritation to the eyes and respiratory system.
Applications of Zinc Oxide
💄 Cosmetics: Used in sunscreens, powders, lotions, and skincare products due to its antiseptic, anti-inflammatory, and astringent properties.
💊 Pharmaceuticals: Found in ointments, creams, powders, and other medicinal products for treating acne, eczema, and diaper rash.
🛞 Rubber Industry: Acts as a filler for rubber, enhancing its strength, durability, and elasticity.
⚗ Chemical Industry: Used as a catalyst in chemical reactions and for manufacturing other chemical compounds.
🌾 Agriculture: Serves as a fungicide and insecticide, protecting crops from pests and diseases.
Safety Precautions
⚠ Avoid contact with eyes, skin, and respiratory system.
⚠ Use protective goggles, respirator, and gloves while handling.
⚠ Store in a dry place, away from children.
Zinc oxide is a cost-effective and widely available compound, making it a popular choice for industrial and household applications.
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