Calcium Oxide (CaO), commonly known as quicklime or burnt lime, is a white or off-white, odorless powder with a high melting point and strong alkaline properties. It is produced by heating limestone (calcium carbonate) in a kiln to release carbon dioxide, leaving behind calcium oxide.
Appearance: Fine white or grayish powder
Formula: CaO
Molar Mass: 56.08 g/mol
Melting Point: ~2,572C
Solubility: Reacts exothermically with water to form calcium hydroxide (slaked lime)
Construction: As a key ingredient in cement and mortar
Industrial: Used in steelmaking, paper production, and wastewater treatment
Chemical: For pH regulation and as a desiccant
Calcium oxide is caustic and reacts vigorously with water. Handle with care using appropriate protective equipment.
Price: