A white powder that decomposes on contact with water and has the characteristic odor of gaseous chlorine. RXSOL conditioned and Stable bleaching powder is used as a disinfectant in water treatment   Bleaching Powder is an inorganic compound with formula Ca(ClO)2. 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. 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. This compound is relatively stable and has greater available chlorine than sodium hypochlorite (liquid bleach).