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What is Hypochlorous Acid

Hypochlorous acid water

Hypochlorous acid water, also known as slightly acidic hypochlorous acid, refers to the solution containing stable hypochlorous acid molecules.As early as the 19th century, scientists discovered that hypochlorous acid (HOCL or HCLO) was one of the most effective bactericidal substances produced by the neutrophils (good globes) in white blood cells.Hypochlorous acid (HOCL or HCLO) is an important part of the human immune system and an immune factor of the human body.Therefore, hypochlorous acid water has a high degree of compatibility with the human body, its characteristics are wide bactericidal spectrum, strong killing force, high safety, good environmental protection.Hypochlorous acid water of different ratio of products, can be used in disease prevention, disease treatment, air purification, water treatment, food processing, beauty and skin, agriculture and animal husbandry and other broad fields.Hypochlorous acid water is a new effective disinfectant used in disinfection field.

(1) physical and chemical properties

Hypochlorous acid water is a colorless transparent liquid, with a relatively light smell, its effective chlorine content is generally 50mg/ l-200mg /L, pH in 4.0-6.5, REDOX potential in 1040 mv above.Under the conditions of room temperature, airtight and dark, the stability is better.Under the condition of being open and not avoiding light, it can be decomposed into oxygen, water and chloride ion, so there is no harmful residue.

(2) killing of microorganisms

Hypochlorous acid water can kill a variety of microorganisms, including bacterial propagators, viruses, fungi and spores.When the ratio of disinfectant to bacterial suspension was 100:1, the killing time of hypochlorite water with effective chlorine content of 50ml was less than 15s for campylobacter, escherichia coli, pseudomonas aeruginosa, staphylococcus aureus, MRSA, tinea albicans and gram-negative aerobic bacteria at room temperature.At 40℃, the killing time of aspergillus Niger and bacillus subtilis black variety spores was less than 30s.Similarly, hypochlorite water with effective chlorine content of 50mg/L 15s inactivated influenza virus and norovirus at room temperature.In the suspension quantitative killing test with the addition of organic matter, the effective chlorine containing 200mg/L hypochlorite water for 10min-20min was greater than 5.

(3) mechanism of killing microorganisms

Hypochlorous acid is an inorganic small molecule, which can penetrate the cell wall and cell membrane of microorganisms, destroy microbial proteins, nucleic acids and other living materials, resulting in the death of microorganisms.

(4) factors affecting the disinfection effect

The effect of hypochlorous acid disinfectant is affected by the amount of organic matter, the concentration of disinfectant, temperature and other factors.There are more organic matters in the system of disinfection objects, and the sterilization effect is relatively reduced.The increase of concentration and temperature of disinfectant can enhance its bactericidal action.Under the condition of suspension bactericidal test without adding organic matter, the killing rate of hypochlorous acid disinfectant with effective chlorine content of 50mg/L on the black variety spores of subtilis reached more than 99.999% at 20℃-25℃ and 3min. At 40℃, hypochlorous acid water with the same effective chlorine content could achieve the same effect only for 30s.The 60mg /L hypochlorous acid disinfectant can achieve the same killing effect at 35℃ for 1min.

(5) scope of application

Hypochlorous acid water can be used for medical and health institutions, all kinds of public places, food processing, restaurants, families and other occasions disinfection of various objects, including endoscopic and surgical instruments, wound/wound, skin and mucous membrane, air, hands, surfaces and fabric, fruits and vegetables, tableware disinfection, secondary water supply facilities.

(6) usage

1) disinfection of endoscope/surgical instruments

Ordinary soaking can be used: before disinfection, the sterilized object is soaked and cleaned by alkaline special cleaning agent or enzyme washing solution, washed with flowing water and drained, at room temperature, with 200mg/L hypochlorous acid water disinfectant solution, immersed in the disinfection object, after 20 minutes of action, with sterile water rinse, sterile gauze dry.When manual cleaning and strengthening the previous process with ultrasonic wave cleaning and disinfection machine of endoscope cleaning and disinfection machine, the process is as follows: clear water to remove organic matter, special cleaning agent wash for 2min, pure water wash for 2min, 200mg/L hypochlorous acid for 3min.

2) wound/wound disinfection

Hypochlorous acid water generator, is the production of hypochlorous acid water equipment.

(1) design principle

The function of hypochlorous acid water generator is essentially to acidify hypochlorous acid ions to form hypochlorous acid molecules.Therefore, the generator needs two raw materials, that is, hydrogen ion supply square - acid material and hypochlorite ion supply square - alkaline hypochlorite.Through the precise control of microcomputer, the acidic raw material and alkaline raw material are introduced into the water stream synchronously to form the continuous production of hypochlorous acid water.This process only relies on the chemical activity of the raw material itself to initiate and continue the reaction process, which consumes less electricity and only has a power of 30W~35w.No consumables such as electrodes;The production efficiency is high, the output of conventional equipment is 300L/h~1000L/h, the hypochlorous acid content and pH of the product can be accurately controlled, and the whole production process is intelligent control, the raw material is completely transformed, without any waste gas waste liquid waste residue pollution.


The generated hypochlorous acid water is a colorless transparent liquid, with a weak odor of chlorine disinfectant, its effective chlorine content is generally 90mg/L ~110 mg/L, pH in 5.5~6.5.It's actually a non-toxic grade disinfectant.Under the condition of being open and not avoiding light, it can be decomposed into oxygen, water and chloride ion by itself.

(2) killing of microorganisms

Hypochlorous acid water has a good killing effect on bacteria propagators, viruses, fungi and other microorganisms.The suspension quantitative killing test showed that the killing pairs of escherichia coli, staphylococcus aureus, pseudomonas aeruginosa and candida albicans were all greater than 5 after being treated for 1min~2min.

(3) mechanism of killing microorganisms

Hypochlorous acid is an inorganic small molecule that can penetrate into the cell wall and cell membrane of microorganisms, destroy microbial proteins, nucleic acids and other living materials, and lead to the death of microorganisms.

(4) factors affecting the disinfection effect

Hypochlorous acid disinfectant by the amount of organic matter, disinfectant dosage, temperature, action time and other factors.Its bactericidal effect is greatly affected by organic matter, and the bactericidal effect decreases with the increase of organic matter concentration in the system of disinfection object.The increase of disinfectant dose, the extension of action time and the increase of disinfection environment temperature can enhance its bactericidal effect.

(5) scope of application

Hypochlorous acid water produced by hypochlorous acid water generator can be used for disinfection of air, ground, surface, fabric, medical equipment, fruits and vegetables, secondary water supply equipment and facilities, food and drink utensils and other objects.At the same time, the generator is easy to operate, high production efficiency, so that the cost of hypochlorous acid water import is greatly reduced, so it is especially suitable for medical and health institutions, public places, educational institutions, swimming pools, food processing enterprises and other occasions with high health and safety requirements, the generated disinfectant must be made and used now.

(6) usage

Hypochlorous acid water generator, for full intelligent control, access to the faucet, after starting up can be connected to the generator from the outlet hypochlorous acid water disinfectant.The suitable operating temperature of the generator is 15℃~30℃.Disinfection using concentrate, is active, if you want to store, need to inject PE (polyethylene, polyethylene) or PET (polyethylene terephthalate, poly (ethyl 2 terephthalate) materials kept sealed in plastic bottles, under the condition of normal temperature, sealed, avoid light, the retention time is less than half a month.For every 10t hypochlorous acid water produced, the raw material needs to be replenished once.

Disinfection methods are spray method, immersion method, flow immersion method, spray method, coating method.When sterilizing the air, use a special aerosol atomizer to spray the original liquid evenly into the air at the dosage of 5ml/m for 30min.Hand disinfection was carried out by means of flowing immersion, which lasted for 1min. The utensils were rinsed or soaked by flowing for 5min~10min.Soak the fruit and fabric for 5min.For the secondary water supply equipment, spraying method was adopted, and the equipment was emptied after 5min~10min.

(7) stability, safety and damage to objects

Hypochlorous acid water is not suitable for long-term storage, storage process pH decreased, hypochlorous acid content decreased, affecting the disinfection effect.Acute oral toxicity and acute inhalation toxicity belong to the actual non-toxic grade, no irritation of the skin mucosa, good safety.There is no corrosion to stainless steel, mild to aluminum, moderate corrosion to copper, carbon steel, some materials of colored fabrics have a little bleaching effect.

Notes: the on-site production of hypochlorous acid water can generally be directly tap water as the source of water, but the quality of water everywhere, the flow rate is different, especially hardness, ph and other factors have an impact on the quality of the hypochlorous acid water generated, it is necessary to add pre-treatment to the water source.