Disinfection principle of hypochlorous acid
Hypochloric acid is the main component of many disinfection products at present. From 84 disinfectants and bleaches to disinfectants in swimming pools, almost all these disinfectants are made by using the disinfection principle of hypochlorous acid, and hypochlorous acid has also played an incredible role in this year's epidemic. So what is the disinfection principle of such a good disinfectant as hypochlorous acid? What is its development history?
Disinfection principle of hypochlorous acid
Disinfection is actually sterilization. Hypochloric acid is weak in acidity, strong in oxidation and unstable. When it is used on the surface of bacteria and viruses, HCl+O is easily decomposed, which will lead to the oxidative decomposition and inactivation of amino acids in microbial protein, and lead to the release of protein, DNA, RNA and other tissues in higher prokaryotic cells, which will kill them completely.
But most of our enzymes are hidden in the organelles of cells, so hypochlorous acid poses no threat to us. In addition, when our human body is invaded by bacteria, white blood cells will secrete hypochlorous acid to "disinfect" the human body. Therefore, pure hypochlorous acid is harmless to human body, but it may be toxic when mixed with other substances with different concentrations, just as 84 disinfectant cannot be directly used on human body.
Discovery and development of hypochlorous acid
The occurrence of hypochlorous acid can be traced back to 1787. When French chemist Beightler studied chlorine as bleaching agent, he introduced chlorine into potassium carbonate solution, and found that the generated potassium hypochlorite solution had strong oxidation. In this regard, hypochlorous acid solution was officially discovered. However, this solution was only used as a bleaching agent at that time. However, because potassium hypochlorite solution is extremely unstable, it is easy to decompose into chlorine gas, which makes people poisoned. So French chemist Labaraqui used cheap sodium hydroxide solution instead of potassium carbonate solution to make sodium hypochlorite solution, which is also the main component of most hypochlorite disinfectants at present.
Hypochloric acid was first used for disinfection.
In the cholera epidemic in Paris of 1832, everyone was troubled by the stench of Vibrio cholerae polluting food and water. Although medical knowledge was limited at that time, people didn't know how to eliminate the virus, but the government decided to use the deodorizing function of sodium hypochlorite to deodorize stinking streets, sewers and other places, which not only removed the stench, but also controlled the cholera epidemic to some extent. Since then, the disinfection function of sodium hypochlorite has been gradually recognized correctly. /kloc-with the popularization of bacterial theory in the late 0/9th century, sodium hypochlorite has become a common reagent for sterilization and deodorization.
Hypochloric acid was first used for human disinfection.
19 14, World War I broke out. Due to the lack of medical care at that time, many wounded soldiers died of wound infection on the battlefield. Therefore, medical experts in all regions hope to find a disinfectant that can kill bacteria without harming human body. Finally, with the efforts of British chemist Darkin, he found that 4% sodium hypochlorite solution has the function of sterilization and wound cleaning at the same time, and will not cause harm to human body. This was called the "Darkin Solution" at the time, and it was
Hypochloric acid was first widely used in China.
Many people may remember the epidemics of hepatitis A and hepatitis B in the late 1980s, when 300,000 people were infected with the virus. The cause of the incident is "eating". In 1980s, China was not very rich, so at that time, only a catty of clams with a price of 680 cents became popular food, and clams with shellfish needed to be fully disinfected before eating, otherwise it would easily lead to various diseases. However, at that time, Shanghai residents only soaked in boiling water and did not fully disinfect it, so many people were infected with hepatitis A, and the spread rate was very fast. During the peak period, more than 10000 cases were added every day.
In the second year, experts formerly known as Beijing No.1 Infectious Disease Hospital successfully developed a disinfectant that can quickly and effectively kill various hepatitis viruses, that is, the 84 disinfectant we use now. The reason why this 84 disinfectant can kill viruses is actually the disinfection principle of hypochlorous acid.
Is hypochlorous acid harmful to human body?
Disinfection principle of hypochlorous acid
Hypochloric acid is often used for disinfection, in fact, it takes advantage of its strong oxidation. HClO is easily decomposed into HCl+O. When oxygen is in the atomic state, it has a strong effect on protein-containing microorganisms such as bacteria and viruses, penetrates the cell membrane of bacteria, releases tissues such as protein, DNA and RNA, and leads to the death of bacteria. For viruses, the purpose of disinfection is to make use of its oxidation of viral proteins and its lethality to nucleic acids.
Hypochloric acid is friendly and safe to the skin, and has strong sterilization and virus killing ability, but its chemical properties are very unstable and it is easy to react with many substances. Therefore, the previously industrially produced hypochlorous acid is generally used to produce bleaching powder, that is, white or light gray calcium hypochlorite solid, and there are also very strict regulations on packaging. If hypochlorous acid is used in a wider range of fields, this stability problem will be solved. Of course, there are mature solutions to the stability problem.
Is hypochlorous acid harmful to people?
In fact, hypochlorous acid is harmful, which is mainly related to the scientific research and production level of hypochlorous acid. The effective content of AE hypochlorous acid of AE company in Germany exceeds the conventional product 1000ppm, and it is transparent, colorless and nontoxic when taken orally. Moreover, the ph value is 3- 12, which can maintain strong bactericidal effect regardless of strong acid and alkali. As far as disinfectants are concerned, pure hypochlorous acid is recognized as the safest chlorine-containing disinfectant in the world.
As far as our human body is concerned, hypochlorous acid will actually be produced. When bacteria invade the human body or the epidermis is damaged, white blood cells will begin to resist foreign bacteria and viruses. At this time, white blood cells will secrete hypochlorous acid, which will specifically destroy the cell walls of bacteria and viruses, making them unable to survive. Because it has the same function as the human body, the so-called biocompatibility and harmlessness.
So it is actually very safe to look at hypochlorous acid alone, but the stability of hypochlorous acid is a worldwide problem. If other substances are added for stability, they may be toxic. In addition, hypochlorous acid itself is an acidic substance. If its concentration is too high, it will inevitably cause other corrosive effects on the human body. However, when the temperature of concentrated aqueous solution reaches 40℃, it will decompose to produce chlorine gas, which is easy to cause headache.
Sewick weak acid hypochlorous acid generator
Weakly acidic hypochlorous acid water produced by Sewick weakly acidic hypochlorous acid generator equipment is a disinfectant solution produced by electrolyzing special electrolyte in a diaphragm-free electrolyzer, with a pH value of 5.5-6.5, an available chlorine content of 10-80 ppm and an oxidation-reduction potential higher than 700mV. Perfect solution to the instability of traditional hypochlorous acid. Because this weak acid hypochlorous acid water has a wider use as a disinfectant.
1. Non-toxic and harmless: because hypochlorous acid will become water after redox reaction, and there is no residue after degradation. This kind of weak acid hypochlorous acid water has high safety, which is almost incomparable to other types of disinfectants. Can be used for food (food disinfection), human body surface, oral cavity, etc. And the safety of babies and pregnant women, disinfection products.
2. Super antivirus: Weak acid hypochlorous acid has strong oxidizing ability, which can make almost all bacteria and viruses tremble. Its disinfection ability is 80- 150 times that of 84 disinfectant.
3. Deodorization: Weak acid hypochlorous acid has a unique redox reaction, which can directly convert polluted gas into harmless substances such as nitrogen, sulfur and water.
Engineering application of weak acid hypochlorous acid
Weak acid hypochlorous acid can be widely used in campus disease prevention, food processing and disinfection, garbage deodorization, stomatology, poultry breeding and so on. The combination of Sewick weak acid hypochlorous acid generator and 5G technology can provide real-time and intelligent disease prevention solutions.
Virus catcher-Sulvik weak acid hypochlorous acid sterilization spray
Sewick weak acid hypochlorous acid water has no chemical residue after use, and can be sprayed on food and skin surfaces or used for oral sterilization. Therefore, babies and pregnant women can use it with confidence. It can be used not only for air sterilization, but also for clothes sterilization, pet deodorization, refrigerator deodorization, pesticide removal, food sterilization, air purification and so on. Is the principle of hypochlorous acid disinfection harmful to human body @20 19