75% alcohol is commonly used in hospitals and can kill Escherichia coli, Staphylococcus aureus, Candida albicans, Pseudomonas aeruginosa, etc. It is also effective against the new coronavirus. The disinfection principle of alcohol is as follows: by entering the interior of bacteria, it absorbs the moisture of protein to denature it, so as to achieve the purpose of killing bacteria. Therefore, only alcohol with a concentration of 75% can better kill bacteria. Concentrations that are too high or too low will not have a bactericidal effect.
Alcohol-based disinfectants also have some disadvantages, such as their volatility, flammability, and pungent odor. It is not suitable for use when the skin and mucous membranes are damaged, and people who are allergic to alcohol are also prohibited from using it. Therefore, in alcohol wipes, because the alcohol is volatile and the concentration is reduced, it will affect the sterilization effect. Alcohol is degreasing and irritating to the skin, which can easily lead to dry and peeling skin.