Apr 05, 2016 · The correct formula for Bleaching powder is CaOCl2. This means that one chlorine is directly bonded to calcium while other to oxygen atom. This is why when we try to calculate Chlorine’s Oxodation number, it comes out to be zero. this is because one of the chlorine is in -1 while the other is in +1 . General Knowledge on common names of chemicals and scientific names of chemicals from Lead the Competition Bleaching powder definition, a white powder that decomposes on contact with water and has the characteristic odor of gaseous chlorine: regarded, when dry, as a mixed calcium hypochlorite-chloride, used as a commercial bleach for wood pulp, textiles, oils, and soaps, and in laundering as a decolorizer and disinfectant. The Chemical Identifier fields include common identification numbers, the NFPA diamond, U.S. Department of Transportation hazard labels, and a general description of the chemical. The information in CAMEO Chemicals comes from a variety of data sources .