Calcium hypochlorite is an inorganic compound with formula Ca(ClO)2. Calcium hypochlorite is one of the most widely used bleaching, sanitation and disinfecting agents in the world. Calcium hypochlorite is considered to be the best product to be used in swimming pool water treatment. As a mixture with lime and calcium chloride, it is marketed as chlorine powder or bleach powder for water treatment and as a bleaching agent. It is an integral component of bleaching powder which also includes calcium chloride and slaked lime. Calcium hypochlorite is the second most used chemical type in the hypochlorite market; sodium hypochlorite (liquid bleach) being the most used type.