Calcium hydroxide is an inorganic compound, represented by the chemical formula Ca(OH)₂, that appears as a white powder or colorless crystal. It is also known as slaked lime or hydrated lime and is produced by adding water to quicklime (calcium oxide). Calcium hydroxide is a strong base used in diverse applications, including construction, paper manufacturing, water treatment, and food processing. Common Uses : Construction: Used in mortar to bind sand and gravel particles by forming calcium carbonate, and for whitewashing walls. Paper Industry: A crucial ingredient in the kraft process for making paper pulp and for recovering sodium hydroxide. Water and Sewage Treatment: Acts as a flocculant to remove impurities from water. Food Industry: Utilized in food production and as a pickling agent for vegetables, though it must be thoroughly rinsed to reduce the risk of botulism. Cosmetics: Used in cosmetic products to stabilize and adjust pH levels. Dentistry: Used as a medicament in root canals to disinfect and stimulate the closure of the root apex.