Mainly represented by disinfectant 84, it is generally made by the reaction of chlorine (Cl2) and sodium hydroxide (NaOH), and sodium hypochlorite in the reaction product is the main component of disinfectant. The main function of sodium hypochlorite disinfection water is to form hypochlorous acid through hydrolysis, and then sterilize it again through the formed hypochlorous acid, which indirectly plays a disinfection role.
Hypochloric acid: According to the paper published in Biocontrol Science by Japanese scientist Professor Fukuzaki in 2006, the sterilization principle of hypochlorous acid was explained. The surface of cell membrane is negatively charged, and hypochlorous acid is a neutral small molecule, which can penetrate the cell membrane, enter the cell, react with DNA and mitochondria inside the cell, kill it and directly sterilize it.
Secondly, in the process of sterilization and virus killing, hypochlorous acid can not only act on the cell wall and virus shell, but also penetrate into bacteria (virus) because of its small molecule and no charge, and react with protein, nucleic acid and enzyme of bacteria (virus) to oxidize or destroy its phosphate dehydrogenase, leading to imbalance of sugar metabolism and cell death, thus killing pathogenic microorganisms.
Differences in scope of application
Sodium hypochlorite (84 disinfectant): mainly used in bleaching, industrial wastewater treatment, papermaking, textile, pharmacy, fine chemical industry, sanitation and disinfection and many other fields. It is not recommended to use 84 disinfectant to disinfect vegetables, fruits and other foods, dining tables and kitchen utensils to avoid disinfectant residue.
Hypochloric acid: it is widely used for sterilization and disinfection in food, beverage, aquatic products and livestock products factories, and for disinfection of environment, hands, skin and mucous membranes in kitchens, restaurants, agriculture, forestry, animal husbandry and fishery, laboratories, pharmaceutical factories, hospitals, nursing homes, kindergartens, schools and hotels. It can be used not only for large-area spraying, but also for sterilization and deodorization in space and mite removal in in addition to formaldehyde. After sterilization, it can be directly reduced to water without corrosion residue.
In application scenarios, hypochlorous acid is widely and comprehensively used because of its advantages such as broad bactericidal spectrum, strong lethality, high safety and good environmental protection.
Differences in security
Sodium hypochlorite (84 disinfectant): pungent and corrosive. Can't be mixed with cleaning products such as vinegar, toilet cleaner, washing powder and baking soda powder, which will produce toxic chlorine after mixing. Chlorine is a gas that irritates and damages the respiratory tract. If inhaled in large quantities, it will make people cough, have difficulty breathing and even faint, which is life-threatening.
Hypochloric acid: close to the human PH value, mild and non-irritating, colorless and tasteless, can directly contact the skin, suitable for all ages, pregnant women and sensitive muscles. In the latest standard of People's Republic of China (PRC) (GB/T36758-20 18) which came into effect in April, 2065438, it is only clear that hypochlorous acid can be used for air disinfection and direct contact with human hands, skin and mucous membranes.
Differences in usage patterns
Sodium hypochlorite (84 disinfectant): usually it needs to be diluted manually in proportion, and protective measures should be worn when diluting. In addition, when using sodium hypochlorite (84 disinfectant) for disinfection, children and the elderly should be kept away from contact, and indoor air circulation should be maintained. After 30 minutes, rinse with clear water to remove disinfection residues.
Hypochloric acid: It can be used directly, without mixing or wearing protective measures. Its composition is stable, and it can be sprayed, dipped and washed in a large area without washing, and it is in direct contact with the skin without potential safety hazards.
From the above comparison, hypochlorous acid has the advantages of relatively high safety performance, strong sterilization ability and good environmental protection. Choose a suitable disinfectant, do a good job of daily sanitation and disinfection, and give yourself and your family the best protection.