5. How to choose a disinfectant that is effective in killing COVID-19?
The method is very simple — look at the chemical composition and concentration.
• ETHANOL – 75% ALCOHOL
The new type of coronavirus has an envelope in its structure, which can be destroyed by medical alcohol, so medical alcohol is very effective in eliminating this virus. Medical alcohol is a mixed solution of ethanol and water. Medical practice has proved that medical alcohol with an ethanol concentration of 75% has the best disinfection effect, can kill a variety of bacteria and viruses, and can also effectively kill the new coronavirus.
For some small areas, especially the surfaces that are afraid of corrosion, you can use the above-mentioned alcohol-based lotion to clean, such as door handles, mobile phones, computers, desktops, etc. Alcohol concentration is not the higher the better. Too high alcohol concentration will deform and solidify the protein, which is not conducive to killing the virus. If you cannot buy a 75% alcohol product, you can buy a 90% alcohol product and dilute it to about 75% before use.
When using 75% medical alcohol for disinfection, you must pay attention to safety.
(1). Do not spray large amounts of alcohol on infants and adults to avoid alcohol allergy.
(2). Keep away from open flames and heat sources. Alcohol is more likely to cause explosion and combustion.
(3). It is recommended to wipe with alcohol for disinfection, and it is not easy to spray on a large area indoors.
(4). Please use with caution if you have skin allergies and wounds.
(5). After using the alcohol each time, the upper cover of the container must be closed immediately, and it is strictly forbidden to leave it open.
• CHLORINE DISINFECTANT-CONCENTRATION IS THE KEY
During the usage of chlorine-containing disinfectants such as bleaching powder, chlorine-containing disinfecting powder, or chlorine-containing effervescent tablets, it will release very active chlorine atoms, and chlorine atoms have strong oxidizing properties, which can quickly destroy the structure of viruses or bacteria and kill them, including this new coronavirus.
The main ingredient of chlorine-containing disinfectants in daily life is sodium hypochlorite. Sodium hypochlorite liquid is the most effective for the disinfection of the surface of large objects that are relatively not afraid of corrosion and damage to the environment, and the disinfection of household items such as the floor and toilets. International authorities such as WHO and CDC also recommend sodium hypochlorite as a disinfectant for epidemic prevention and control, especially for environmental disinfection in medical institutions.
One of the major drawbacks of disinfectants containing sodium hypochlorite is that it is very irritating and corrosive. This disinfectant is not suitable for some easily damaged objects. For the disinfection of the floor, bathroom, and environment, 0.5~0.75% sodium hypochlorite solution or 10% bleach (the main ingredient is calcium hypochlorite) solution can be used for disinfection. The concentration of the disinfectant is the key, when using this disinfectant, please strictly follow the product instructions, dilute it in proportion, and put it in a plastic container, then take an appropriate amount of the liquid for disinfection and sterilization.
In addition, it’s worth noting that it’s not that the name contains the word “chlorine” is disinfectant that containing chlorine. Disinfectant products represented by Dettol and Walch disinfectant, whose active ingredient is p-chloro-m-xylenol, it is a phenolic disinfectant, not a chlorine-containing disinfectant. According to current data, phenolic disinfectants and quaternary ammonium salt disinfectants are not effective against coronavirus.
MATTERS NEED ATTENTION
(1). Although chlorine-containing disinfectants have the strong bactericidal and virus-killing ability, they are also irritating. When using, be sure to avoid the skin, mouth, and nose.
(2). chlorine-containing disinfectants cannot be used at the same time with acidic solvents such as toilet cleaners, which are likely to produce toxic gases.
(3). It is not recommended to use alcohol at the same time, the disinfection effect may be weakened and even toxic gas may be generated.
(4). It has a corrosive and bleaching effect on fabrics, so it cannot be used for the disinfection of colored clothes and other fabrics.
(5). The configuration and use method of chlorine-containing disinfectant should be determined according to the content of available chlorine and the disinfection object. After configuration, choose the way of soaking or wiping for disinfection.
(6). Be sure to dilute according to the instructions, control the concentration, and wear gloves and masks when using, and avoid direct contact with the skin.
(7). When diluting, please use cold water, hot water will accelerate the volatilization of chlorine and affect its sterilization effect.
• PEROXIDE DISINFECTANT
Both hydrogen peroxide and peracetic acid are common peroxide disinfectants. When used, they release highly reactive oxygen atoms, which are as strong as chlorine atoms, can destroy the structure of bacteria or viruses, thereby killing bacteria and viruses. Peroxide disinfectants have poor stability, and there is a risk of explosion when the concentration is high, so it is not easy to buy on the market. For ordinary consumers, the preparation of peroxide disinfectants is also difficult, and it is recommended to use them under the guidance of professionals.
MATTERS NEED ATTENTION
Most peroxide disinfectants will damage the eyes and respiratory mucosa of humans and animals when used for a long time.