The difference between chlorine-containing disinfectants, hypochlorous acid disinfectants, and chlorine dioxide disinfectants

Chlorine

Disinfectants

Chlorine-containing disinfectants are disinfectants that dissolve in water to produce hypochlorous acid. The preparation itself does not contain hypochlorous acid, and hypochlorite is used as the preparation form, which can only be produced after being dissolved in water, and hypochlorous acid is usedHClO is a microbicidal ingredient. Includes bleaching powder: Contains available chlorine25% (W/W), Bleaching Powder: Contains available chlorine 80% (W/W), 3-in-2, containing 56% (W/W) available chlorine, sodium hypochlorite, industrially prepared with available chlorine 10% (W/W), Sodium dichloroisocyanurate with 60% available chlorine (W/W), trichloroisocyanuric acid with available chlorine 85%～90% W/W) , trisodium chloride phosphate, containing 2.6% available chlorine（W/W）。

Chlorine-containing disinfectants are highly effective disinfectants (kill E. coli, Staphylococcus aureus, Candida albicans, bacillus subtilis black variant spores and natural colonies), with broad spectrum, high efficiency, low toxicity, strong pungent odor, corrosive to metal, It has a bleaching effect on fabrics, is greatly affected by organic matter, and the disinfectant is unstable.

Scope of application: It is suitable for general object surfaces, medical devices, medical waste, meals in medical and health institutions, public places and homes(Tea).Disinfection of utensils, fabrics, fruits and vegetables, water, various pollutants in epidemic foci, etc., but cannot be used for air disinfection, disinfection of the surface of secondary water supply equipment and facilities, hands, skin and mucous membranes

Usage

1. Preparation of disinfectant: According to the available chlorine content, the chlorine-containing disinfectant is prepared into a solution of the required concentration with distilled water.

2. How to use: Commonly used disinfection methods include soaking, wiping, spraying and dry powder disinfection.

(1) Soaking method: put the items to be disinfected into a container filled with chlorine-containing disinfectant solution and cover it. Disinfection of items contaminated with bacterial propagules is soaked in a disinfectant solution containing 500mg/L of available chlorine More than 10min; Disinfection of items contaminated with blood-borne pathogens, mycobacteria and bacterial spores with 2000 mg/L~, available chlorine Soak in 5000mg/L disinfectant More than 30min.

(2) Wipe method: Disinfect large items or other items that cannot be disinfected by soaking method. For disinfection, all drug concentrations and action times are described in the immersion method.

(3) Spraying method: 1000mg/L is used on the surface of general polluted itemsThe disinfectant solution is evenly sprayed for more than 30min; For the disinfection of contaminated surfaces such as blood-borne pathogens and Mycobacterium tuberculosis, spray evenly with a disinfectant containing 2000mg/L of available chlorine More than 60min. There is a strong pungent odor after spraying, and personnel should leave the scene.

(4) Dry powder disinfection method: for the disinfection of excrement, dry powder containing chlorine-containing disinfectant is added to the excrement to make it contain 10,000mg/L of available chlorine , after slightly stirring, act 2h～6hFor the disinfection of hospital sewage, use dry powder according to 50mg/L of available chlorine The dosage was added to the sewage, stirred evenly, and discharged after 2 hours.

Notes:

1. The powder should be stored in a cool place away from light, moisture and sealed; The water agent should be stored in a cool place away from light and sealed. The required solution should be prepared and used on the spot.

2. When preparing powder solutions such as bleaching powder, wear masks and gloves.

3. Chlorine-containing disinfectants without rust inhibitors are corrosive to metals, and metal instruments should not be disinfected; After sterilizing metal instruments with a chlorine-containing disinfectant with rust inhibitor, they should be rinsed with sterile distilled water and dried before use.

4. It has corrosive and bleaching effect on fabrics, and should not be disinfected for colored fabrics.

5. For disinfection of tableware, it should be rinsed with water immediately.

6. When disinfection, if there is a large amount of organic matter, the concentration should be increased or the action time should be extended.

7. When used for sewage disinfection, the concentration should be appropriately increased according to the content of reducing substances in the sewage.

Hypochlorous acid

Disinfectants

It is a chlorine-containing disinfectant, and the microbicidal ingredient is also hypochlorous acid HClOHowever, the stock solution itself contains stable hypochlorous acid, and chlorine-containing disinfectant is a disinfectant that can produce hypochlorous acid when dissolved in water.

The main difference from the above other chlorine-containing disinfectants is that this type of disinfectant can be used in medical and health institutions, public places and homes for general surfaces, medical equipment, medical waste, meals (Disinfection of tea, fabrics, fruits and vegetables, water, and various pollutants in the fociIt can also be used for air disinfection, disinfection of the surface of secondary water supply equipment facilities, hands, skin and mucous membranes.

Chlorine dioxide disinfectant

Chlorine dioxide disinfectant is sodium chlorite NaClO₂or sodium chlorate as the main raw material for the production of preparationsFree chlorine dioxide (ClO) can be produced through physicochemical reactions₂)It is a disinfection product with the main effective sterilization ingredient. Chlorine dioxide content is measured in mg/L or% dedicated.

Chlorine dioxide is a yellow-green to orange-yellow gas that is internationally recognized as a safe and non-toxic green disinfectant. Chlorine dioxide in stabilized chlorine dioxide disinfectants is chlorite NaClO2After activating with an activator, chlorine dioxide with bactericidal effect can be released. The bactericidal ability is similar to that of a pure chlorine dioxide disinfectant solution.

Chlorine dioxide is a highly effective disinfectant (Kills Escherichia coli, Staphylococcus aureus, Pseudomonas aeruginosa, Candida albicans, Mycobacterium turtle subsp. abscess, poliovirus, bacillus subtilis black variant spores, and natural colonies).It has a broad-spectrum, high-efficiency and fast-acting sterilization effect. It is corrosive to metals, has a bleaching effect on fabrics, and the disinfection effect is greatly affected by organic matter, and the chlorine dioxide activation solution and dilution are unstable.

Scope of application: Applicable todisinfection of the environment and surfaces; Disinfection of food processing utensils, dining utensils, vegetables and fruits, disinfection of drinking water (including secondary water supply), swimming pool water, hospital sewage, urban water, air disinfection and disinfection of non-metallic medical equipment

How to use:

1. Preparation of disinfectant: Before use, add activator to the chlorine dioxide stabilized solution. According to the effective content, chlorine dioxide is diluted with deionized water according to the law of dilution. For specific steps, see 3.1.8.2(3）1) Carry out.

2. Disinfection treatment: common disinfection methods include soaking, wiping, and spraying,spray method and other methods.

(1) Immersion method: immerse the cleaned and dried items to be sterilized or sterilized in a container filled with chlorine dioxide solution and cover it. For disinfection of items contaminated by bacterial propagules, use 100mg/L~ Soak in 250mg/L chlorine dioxide solution 30min； Disinfection of hepatitis virus and Mycobacterium tuberculosis contamination with 500mg/L chlorine dioxide 30min； Disinfect items contaminated with bacterial spores by soaking in 1000mg/L chlorine dioxide 30min。

(2) Wipe method: Disinfect large items or other items that cannot be disinfected by soaking method. For disinfection, all drug concentrations and action times are described in the immersion method.

(3) Spraying method: 500mg/L is used for generally polluted surfacesChlorine dioxide is evenly sprayed, acting 30min； Surfaces contaminated with hepatitis virus and Mycobacterium tuberculosis are evenly sprayed with 1000mg/L chlorine dioxide to have an effect 60min。

(4) Drinking water disinfection method: add 5mg/L to the drinking water source water of chlorine dioxide, effect 5min, so that the number of E. coli reaches the drinking water hygiene standard.

(5) Spray method:For air disinfection in a specific space, use an aerosol sprayer with 500mg/LChlorine dioxide solution in accordance with20ml/m³～30ml/^m3 for spray disinfection, The effect is at least 30min-60min.

(6) 10ml/^{m3 can also be used}～20ml/m³Heating evaporation or activator fumigation disinfection, disinfectant dosage, disinfection time, operation methods and precautions should follow the manufacturer's instructions.

(7) There are chlorine dioxide air disinfection machines on the market, which are easy to use and have ideal effects, and can be used according to the instructions for use.

Notes:

1. The chlorine dioxide activation solution is unstable and should be prepared and used.

2. When preparing the solution, avoid mixing with alkali or organic matter.

3. Chlorine dioxide is corrosive to metals and has a bleaching effect on fabrics, so after chlorine dioxide disinfection, it should be quickly rinsed with clean water and drained.

Performance

Chlorine dioxide

Chlorine-containing disinfectants

Bactericidal power

Kills all microorganisms, including bacterial spores

It can kill all bacterial propagules, and high concentrations can kill spores

Commonly used concentrations

30-200ppm

250-1500ppm

toxicity

innocuity

Moderate toxicity

"Three Directions". effect

not

Yes

Organic interference

small

big

pH effects

small

Expires at 8.5 for >

Influence of use temperature

below 50°C

below 50°C

Corrosive

Stainless steel is non-corrosive

Metals are strongly corroded

Skin sensitization

not

Yes

residue

not

Yes

smell

Slight chlorine dioxide smell

Strong chlorine taste

Cost of use

Lower

low

stability

stable

Unstable and easy to decompose

Resistance

not

Yes