Calcium Hypochlorite (Chlorine) with the chemical formula Ca(OCI)2 has a content of 60-65% which is usually used to maintain the condition of swimming pool water so that it is free from bacteria, for water purification, as a swimming pool disinfectant, as a bleaching compound, etc. The way to use it is by first depositing it in a bucket and then pouring it into the pool. Please be careful when using it. Calcium Hypochlorite (chlorine) dissolves in water and is hygroscopic (absorbs water).