Calcium oxide, commonly known as lime, is a chemical compound with the formula CaO.Calcium oxide, also known as quicklime, is an alkaline substance that has been in use since the medieval age. It is believed that quicklime is one of the oldest chemicals known to the human race. It can also be referred to as burnt lime or lime.

Properties of Calcium oxide

Chemical Formula : CaO

Density : 3.34 g/cm³

Molar Mass : 56.0774 g/mol

Solubility : Soluble in water & glycerol

Boiling Point : 2850 °C

Melting Point : 2572 °C

Uses of Calcium Oxide

It is extensively used for medicinal purposes and insecticides.

It finds its application in the manufacturing of cement, paper, and high-grade steel.

Lime is used as a reagent in laboratories for dehydration, precipitation reaction, etc.

It is the cheapest alkali available which is an important ingredient in the manufacturing of caustic soda.

Calcium is essential to animal life as the constituent of bones, shells, and teeth. The most common of the calcium compounds are calcium carbonate which the potter uses as a source of calcium oxide for glazes.