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

Chlorine

disinfectant

Chlorine-containing disinfectants are disinfectants that dissolve in water to produce hypochlorous acid. The preparation itself does not contain hypochlorous acid, with hypochlorite as the form of the preparation, hypochlorous acid can only be produced after being dissolved in water, and hypochlorous acid HClO is used as a microbicidal component. Including bleaching powder: containing 25% (W/W) of available chlorine, bleaching powder: containing 80% (W/W) of available chlorine, three-in-two, containing 56% (W/W) of available chlorine, sodium hypochlorite, industrially prepared containing 10% of available chlorine (W/W), sodium dichloroisocyanurate, containing 60% of available chlorine (W/W), trichloroisocyanuric acid, containing 85% ~ 90% of available chlorine W/W), trisodium chloride phosphate, containing 2.6% of available chlorine (W/W).

Chlorine-containing disinfectant is a highly effective disinfectant (killing Escherichia coli, Staphylococcus aureus, Candida albicans, bacillus subtilis black variant spores and natural colonies), with broad-spectrum, high efficiency, low toxicity, strong irritating odor, corrosive to metals, bleaching effect on fabrics, great influence of organic matter, and unstable disinfectant.

Scope of application: It is suitable for the disinfection of general surfaces, medical equipment, medical waste, dining (tea) utensils, fabrics, fruits and vegetables, water, and various pollutants in epidemic foci in medical and health institutions, public places and families, 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. For the disinfection of items contaminated by bacterial propagules, soak them in a disinfectant solution containing 500mg/L of available chlorine for more than 10 minutes; For the disinfection of blood-borne pathogens, mycobacteria and bacterial spores contaminated items, soak in a disinfectant containing 2000 mg/L~5000mg/L of available chlorine for 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: spray evenly with 1000mg/L disinfectant solution on the surface of generally polluted items, and the effect is 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 for 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, add dry powder of chlorine-containing disinfectant to the excrement to make it contain 10000mg/L of available chlorine, after a little stirring, it will act for 2h~6h, and for the disinfection of hospital sewage, add dry powder to the sewage according to the amount of effective chlorine 50mg/L, and stir evenly, and discharge it after 2h.

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 sewage.

hypochlorous acid

disinfectant

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

The main difference with the above other chlorine-containing disinfectants is that in addition to being used for disinfection of general surfaces of medical and health institutions, public places and families, medical equipment, medical waste, dining (tea) sets, fabrics, fruits and vegetables, water, and various pollutants in epidemic foci, etc., this disinfectant can also be used for air disinfection, disinfection of secondary water supply equipment and facilities, hands, skin and mucous membranes.

Chlorine dioxide disinfectant

Chlorine dioxide disinfectant is a disinfection product produced by sodium chlorite NaClO2 or sodium chlorate as the main raw material, and free chlorine dioxide (_ClO2) can be produced as the main effective bactericidal ingredient through physical and chemical reaction operations. Chlorine dioxide content is expressed in mg/L or %.

Chlorine dioxide is a yellow-green to orange-yellow gas that is internationally recognized as a safe and non-toxic green disinfectant. The chlorine dioxide in the stabilized chlorine dioxide disinfectant exists in the form of chlorite_NaClO2, which can only be activated with an activator to release chlorine dioxide with bactericidal effect. The bactericidal ability is similar to that of a pure chlorine dioxide disinfectant solution.

Chlorine dioxide is a highly effective disinfectant (killing Escherichia coli, Staphylococcus aureus, Pseudomonas aeruginosa, Candida albicans, Mycobacterium tortoises subsp. abscess, poliovirus, bacillus subtilis black variant spores and natural colonies), with broad-spectrum, efficient and fast-acting bactericidal 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: suitable for disinfection of the environment and object 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. The specific steps are as follows 3.1.8.2(3)1).

2. Disinfection treatment: Common disinfection methods include soaking, wiping, spraying, spraying 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, soak in 100mg/L~250mg/L chlorine dioxide solution for 30min; For disinfection of hepatitis virus and Mycobacterium tuberculosis contaminated items, soak in 500mg/L chlorine dioxide for 30min; For disinfection of bacterial spore contaminated items, soak in 1000mg/L chlorine dioxide for 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: for the general polluted surface, spray evenly with 500mg/L chlorine dioxide for 30min; For the surface contaminated with hepatitis virus and Mycobacterium tuberculosis, spray evenly with 1000mg/L chlorine dioxide for 60min.

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

(5) Spray method: used for air disinfection in a specific space, using an aerosol sprayer, using 500mg/L chlorine dioxide solution according to the dosage of 20ml/m 3~30ml/m³ for spray disinfection, the effect is at least 30min-60min.

(6) 10ml/m³~20ml/m³ can also be used for heating evaporation or activator fumigation and disinfection, and the dosage of disinfectant, 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

The "three-fold" 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