Chlorine-containing disinfectants include sodium hypochlorite, calcium hypochlorite and trisodium phosphate chloride. These chlorine-containing inorganic substances can be dissolved in water to produce hypochlorous acid with bactericidal activity, which can be used for sterilization and disinfection. For example, the main component of the 84 disinfectant we often use is sodium hypochlorite. It has a good killing effect on intestinal pathogenic bacteria, pyogenic cocci and bacterial spores. Chlorine-containing disinfectants can be used to disinfect the surface of objects and contaminated items, such as body fluids, secretions and excretions of patients.