Zinc Oxide

Zinc oxide is an inorganic compound with the formula ZnO. It is a white powder that is insoluble in water. ZnO is used as an additive in numerous materials and products including cosmetics, food supplements, rubbers, plastics, ceramics, glass, cement, lubricants,paints, sunscreens, ointments, adhesives, sealants, pigments, foods, batteries, ferrites, fire retardants, semi conductors, and first-aid tapes. Although it occurs naturally as the mineral zincite, most zinc oxide is produced synthetically.

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Application

ZnO is a white powder that is insoluble in water, and it is widely used as an additive in numerous materials and products including rubbers, plastics, ceramics, glass, cement, lubricants,[5] paints, ointments, adhesives, sealants, pigments, foods, batteries, ferrites, fire retardants, and first-aid tapes

Chemical formula

ZnO
Molar mass

81.406 g/mol
Appearance

White solid
Odor

Odorless
Density

5.6 g/cm3
Melting point

1,974 °C (3,585 °F; 2,247 K) (decomposes)
Boiling Point

2,360 °C (4,280 °F; 2,630 K) (decomposes)
Solubility in water

0.0004% (17.8°C)
Band Gap

3.2 eV (direct)
Electron mobility

180 cm2/(V·s)
Magnetic susceptibility (χ)

−27.2·10−6 cm3/mol
Thermal conductivity

0.6 W/(cm·K)
Refractive index (nD)

n1=2.013, n2=2.029

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