Calcium hypochlorite is a chemical compound with formula Ca(ClO)2. It is widely used for water treatment and as a bleaching agent (bleaching powder). This chemical is considered to be relatively stable and has greater available chlorine than sodium hypochlorite (liquid bleach).
It is manufactured using the calcium process or the sodium process.
2 Ca(OH)2 + 2 Cl2 → Ca(OCl)2 + CaCl2 + 2 H2O
Calcium hypochlorite is used for the disinfection of drinking water or swimming pool water. For use in outdoor swimming pools, calcium hypochlorite can be used as a sanitizer in combination with a cyanuric acid stabilizer.
Calcium hypochlorite is used by many paper conservationists to bleach archival papers, and it is used as an oxidizing agent to reduce the effects of foxing. Any hypochlorite of calcium, the normal anhydrous salt (Ca(ClO)2), that is generally found in commercial products contains 50 to 75% available chlorine.
It is used as a bleaching agent (paper, textiles), bactericide, deodorant, water Purification, sterilizer, disinfectant for swimming pools, fungicide and in sanitary Installations.