Because it is hypochlorous acid, not sodium hypochlorite, that is bleaching.
Cl2+2NaOH=NaCl+NaClO+H2O
hypochlorous acid produced by the reaction of sodium hypochlorite with carbon dioxide is the effective component of bleaching agent.
NaClO+CO? +H? O=NaHCO? +HClO
sodium hypochlorite is used as water purifier, disinfectant and bactericide in the field of water treatment; Used for sterilization and algae removal of industrial water and swimming pool water; It is also used to decompose organic matter, and as an assistant to remove iron and manganese.
sodium hypochlorite is a strong oxidant and corrosive. Skin contact can cause burns. Entering the human body will lead to mucosal corrosion, esophageal or tracheal perforation and laryngeal edema. Inhalation into the lungs can cause severe bronchial burns and edema in the lungs. Workers who contact and use sodium hypochlorite should wear specified protective articles to prevent sodium hypochlorite solution from touching the skin or entering the human body. If you accidentally touch the skin or enter the human body, you should immediately rinse or rinse with sodium bicarbonate solution.
the sodium hypochlorite solution should be packed in plastic barrels or tank trucks, and the packaging container should be marked with weight. It should be stored in a dry and dark warehouse, sealed during transportation, and the shipping container should be anti-corrosive.
when sodium hypochlorite is used for disinfection of reclaimed water and sewage, the original solution is generally diluted to a concentration of 3% before use, and it is directly added to the water system with a corrosion-resistant metering pump. When using, the pH value of water system should be controlled below 6., and sodium hypochlorite is often used in water systems with less chlorine consumption.