Calcium Hydroxide is a substance that is inorganic and has the chemical formula Ca(OH)2. When quicklime (calcium oxide) and water are combined, it is a colourless crystal or white powder. It goes by a variety of names, including pickled lime, hydrated lime, caustic lime, builders lime, and slaked lime. Calcium hydroxide, often known as E number E526, is a chemical that is employed in a variety of processes, including the production of food. A saturated solution of calcium hydroxide is known as limewater, often known as milk of lime.