Why is the concentration of slightly acidic hypochlorite disinfectant lower than that of ordinary chlorine-containing disinfectant?
Chlorine-containing disinfectants: disinfectants that can produce hypochlorite when dissolved in water.
2,000ppm sodium hypochlorite releases about 4-40ppm hypochlorous acid (the amount released varies depending on the conditions), and its main ingredient is not hypochlorous acid.
Hypochlorite Disinfectant: Disinfectant in which the original solution of disinfectant contains stable hypochlorite.
The hypochlorite disinfectant of 50 to 80 ppm contains hypochlorite is 50 to 80 ppm, without the need to react to the process of release.
Disclaimer:
Hypochlorite disinfectants have a pH ≤ 7, and the best germicidal effect is at pH=5, but the safest pH range for long-term use is between 6.20 and 6.80.
Chlorine disinfectants with pH>7 are not hypochlorite disinfectants.
The higher the concentration of hypochlorite the more unstable, effective chlorine concentration ≥ 100 ppm hypochlorite solution is unstable, not easy to store, suitable for ready-to-use. So hypochlorite disinfectant solution is easy to get high concentration, low concentration is difficult to get, expensive concentration is low.
Study shows that, under the same test conditions, in the solution in the form of molecules of hypochlorous acid in the bactericidal capacity of sodium hypochlorite 80-100 times.
Most commercially available chlorine disinfectants are sodium hypochlorite disinfectants. Sodium hypochlorite dissolved in water can produce trace amounts of hypochlorous acid, and the main component of disinfection is these trace amounts of hypochlorous acid. Sodium hypochlorite disinfectant reaction released hypochlorite content is very low, pH 10.0, the release of hypochlorite content of only 0.26%), the higher the alkalinity of the release of the content of the lower, if you want to achieve the same disinfection effect, you need to use a high concentration of large doses, which leads to chemical residues, irritation and corrosiveness.
Relationship between effective chlorine content, hypochlorite content and germicidal ability
Effective chlorine is the oxidized state chlorine contained in chlorine-containing compounds. Oxidized chlorine in the redox reaction can release its oxidation and be reduced to the reduced state of chlorine with a valence of -1 natural stable state, this reaction process can be utilized, such as 84 and bleach used for bleaching, disinfection and so on. So these oxidized chlorine is the chlorine that can be effective, and as the name suggests, it is called effective chlorine.
Hypochlorite (ClO-_) and hypochlorous acid (HCIO) are both effective chlorine, but their principles of killing are quite different.
And hypochlorous acid makes the chlorine disinfectant present in its most essential way, which is equivalent to extracting the most core active ingredients of common chlorine disinfectant, discard other redundant and ineffective ingredients, and the concentration of disinfectant can be greatly reduced, with no residue, no bleaching, no corrosion, and no irritation.
Chlorine presence form and solution pH relationship graph
Why hypochlorite is more expensive than ordinary chlorine disinfectant?
Because hypochlorite itself is unstable and will react quickly with organic matter. So the whole production of hypochlorite disinfectant has very high requirements for the process, water treatment process, generation process, storage process and filling process ways and means, the quality requirements of the container package and so on, which is the main reason why hypochlorite disinfectant is higher than other chlorine-containing disinfectants.
3, non-electrolytic micro-acid hypochlorite and other methods of generating hypochlorite why the price difference is so much?
Simply put, take the car as an analogy, under the premise of the same displacement and weight, the lower the fuel consumption, the more environmentally friendly, the higher the technical content, the more expensive.
The concentration of hypochlorite produced by electrolysis and mixing methods is generally higher than that of non-electrolytic micro-acid hypochlorite disinfectants because the other methods of hypochlorite disinfectants are generally ready to use, the warranty period is very short, and it is difficult to keep it stable for a long period of time without adding stabilizers. In particular, the electrolysis of water needs to be sufficient conductivity, the purer the water is, the less likely to conduct electricity, so it is necessary to add a large number of electrolyte components, the stability and safety of the product is affected. Laboratory studies have shown that, under the same preservation conditions, if preserved for more than 3 months or more, the natural attenuation of effective chlorine in the disinfectant of other processes will not be able to achieve the effect of effective disinfection. Therefore, in the disinfectant industry, to achieve a 1-year warranty period of hypochlorite disinfectant of other processes, the concentration needs to be increased to 100ppm or even higher, such as 250ppm or more, in order to offset the natural attenuation of effective chlorine during the warranty period, so as to achieve the established disinfection effect.
Non-electrolytic micro-acid hypochlorite disinfectant, just the opposite, the purer the better, the water quality requirements are extremely high, ordinary tap water can not meet the production requirements, the need to use RO pure water, and the production process is special, the production of equipment in the operation of the production of the allowable range of pH value accurate intelligent control between 6.20 ~ 6.80, out of the range of automatic stops, the generation of the value is set to a median value of 6.50 ± 0.05 of the narrow range of intervals, so the product is highly stable, in the light and sealed preservation environment, the warranty period can be up to 18 months, and to ensure that the effective chlorine content is sufficient to achieve the effect of disinfection and sterilization, and at the same time to protect the safety of the product.
This means that the lower the concentration and the longer the shelf life of the disinfectant, the more advanced the production process, the less the burden on the environment, and the higher the price, all with the same disinfectant effect and the same preservation method.
Recommended CELA water (micro acid hypochlorite?) produced by Wanlai. Japan patented technology, the trusted choice of Japanese moms), used for human body, air disinfection is its basic function, CELA water can also be applied to infants, young children, pregnant women groups. At the same time, it can also be used as a food preservative additive.