The most suitable concentration of alcohol disinfection is 75%, too low concentration may affect the disinfection effect, if the concentration is too high, the actual disinfection effect is also affected. Some people will mistakenly believe that the higher the concentration, the better the disinfection effect of alcohol, but this is not the case. Because alcohol is used to denature the proteins of viral bacteria, alcohol penetration will destroy their structure and lead to the death of the pathogen. If the concentration is too high, the surface of the pathogen will be instantly denatured to form a protective layer of proteins, instead of allowing the alcohol to enter the pathogen, which will affect the disinfection effect. Therefore, it is not recommended to mix alcohol concentration at home, because alcohol is a flammable and explosive product, which may pose certain dangers if not handled properly. In addition, inaccurate concentration may also affect the effectiveness of disinfection. The alcohol itself needs to be kept airtight to prevent evaporation to reduce the concentration, which may also affect the disinfection effect. Content source: Dr. You Lai