Hypochloric acid water is actually an aqueous solution of hypochlorous acid, which can be divided into strong acid hypochlorous acid water, weak acid hypochlorous acid water and weak acid hypochlorous acid water.
1, strong acid hypochlorous acid water
Strong acid hypochlorous acid water means that the PH value is less than 5.0, which is mainly used for surface disinfection. Because of its strong oxidation, it does not reflect the unique safe sterilization characteristics of hypochlorous acid. Generally, it is rarely produced by manufacturers now, because the function can be replaced by a cheaper 84. Some strong acid hypochlorous acid with PH less than 5.0 on the market are basically products that sell dog meat by hanging sheep's head.
2. Weak acid hypochlorous acid water
The technology from Japan, the PH value is generally controlled at 5.0-7.0, which is close to the human acid-base environment. The sterilization speed of hypochlorous acid produced by electrolysis is 80 times that of sodium hypochlorite, and it is non-toxic and has no residue. However, hypochlorous acid is very unstable, so some brand manufacturers will add stabilizers during production, so that the shelf life of products can reach 12 months or more.
3, weak acid hypochlorous acid water
This technology also comes from Japan and was invented by Japanese inventor Yamamoto, which is now CELA water in Japan. It is an evolved version of weak acid hypochlorous acid water. The sterilization speed is also 80 times that of sodium hypochlorite, but the product is safer and achieves medical-grade safety. When the product is produced, the PH value is intelligently controlled at 6.50 0.05 (the median pH value of healthy people's oral environment is 6.50 from 6.20 to 6.80), and the validity period can reach 18 months without stabilizer in the sun protection environment. At low concentration, slightly acidic hypochlorous acid water can be suitable for infants, and CELA hypochlorous acid water is a series of infant products development.
Second, the role of hypochlorous acid water-the killing effect on microorganisms
Hypochloric acid can kill various microorganisms, including bacterial propagules, viruses, fungi and spores. At room temperature, the disinfection time of hypochlorous acid water containing 50 ml of available chlorine to Campylobacter, Escherichia coli, Pseudomonas aeruginosa, Staphylococcus aureus, methicillin-resistant Staphylococcus aureus, Trichophyton albicans and Gram-negative aerobic bacteria is less than15s; . At 40℃, the killing time of Aspergillus Niger and Bacillus subtilis is different. Similarly, at room temperature, 15s hypochlorous acid water containing 50mg/L available chlorine inactivated influenza virus and norovirus. The quantitative killing test of organic matter in suspension showed that hypochlorous acid water containing 200mg/L available chlorine (10min-20min) had a negative effect on Bacillus subtilis var. Niger is greater than 5.
Three. Scope of application of hypochlorous acid water:
The hypochlorous acid water can be used for disinfection of various articles in medical and health institutions, various public places, food processing, restaurants, families and other occasions, including disinfection of endoscopes, surgical instruments, sores/wounds, skin mucosa, air, hands, surfaces and fabrics, fruits and vegetables, tableware, secondary water supply equipment and facilities, etc.
In addition to the above functions, weak acid hypochlorous acid water, such as CELA weak acid hypochlorous acid water, can disinfect the air in indoor environment with people, which is not available in any other non-weak acid hypochlorous acid disinfectant.