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Calcium Oxide (CaO)-Powder

  • 1305-78-8
  • CaO
  • 99.9%-99.95 %
  • - 20 mesh/- 425 mesh (15.86 mic aps).etc
  • Class 8
  • 215-138-9
  • UN1910
  • PG III


Calcium oxide (CaO), commonly known as quicklime or burnt lime, is a widely used chemical compound. It is a white, caustic, alkaline, crystalline solid at room temperature. The broadly used term "lime" connotes calcium-containing inorganic materials, in which carbonates, oxides and hydroxides of calcium, silicon, magnesium, aluminium, and iron predominate.

Chemical formula:CaO

Molar mass:56.0774 g/mol

Appearance:White to pale yellow/brown powder


Density:3.34 g/cm3

Melting point:2,613 °C (4,735 °F; 2,886 K)

Boiling point:2,850 °C (5,160 °F; 3,120 K) (100 hPa)

Solubility in water:Reacts to form calcium hydroxide

Solubility in Methanol:Insoluble (also in diethyl ether, octanol)

Acidity (pKa):12.8

Magnetic susceptibility (χ):−15.0×10−6 cm3/mol


As a dehydrator

Production of calcium carbide

Destruction of opium

Reduce the acidity of sewage

Remove the sulfur from the exhaust

Reduce the bad smell of biodegradation

Improving acid soils for agriculture.

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