Calcium oxide is a member

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Quicklime is relatively cheap. It and its chemical derivative calcium hydroxide (of which quicklime is an alkali anhydride) are important household chemicals.

Calcium oxide (CaO), commonly known as quicklime or quicklime, is a widely used compound. It is a white, corrosive, alkaline, crystalline solid at room temperature. The broadly used term "lime" denotes a calcium-containing inorganic material in which carbonates, oxides and hydroxides of calcium, silicon, magnesium, aluminum and iron predominate. In contrast, quicklime is particularly suitable for the single compound calcium oxide. Calcium oxide that survives processing without reacting in building products such as cement is known as free lime. [5]

Calcium oxide is a member of the class of calcium oxides of calcium and oxygen in a 1:1 ratio. It has a role as a fertilizer.

 

Quicklime is relatively cheap. It and its chemical derivative calcium hydroxide (of which quicklime is an alkali anhydride) are important household chemicals.

Calcium oxide is usually produced by the thermal decomposition of materials containing calcium carbonate (CaCO3; the mineral calcite), such as limestone or shells, in lime kilns. This is accomplished by heating the material to temperatures above 825 °C (1,517 °F),[6][7] a process known as calcination or lime burning, to release a molecule of carbon dioxide (CO2), leaving quicklime. It is also one of the few known chemical reactions from prehistoric times.

Calcium oxide appears as an odorless, white or gray-white solid in the form of hard lumps. A strong irritant to skin, eyes and mucous membranes. Used in insecticides and fertilizers.

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