However, some people said that the alcohol hand sanitizer stored at home is very volatile, and the concentration of the alcohol after the volatilization does not reach the standard for killing viruses and bacteria, and the effect will be greatly reduced when used. This statement is correct. Medical disinfection alcohol is generally composed of alcohol (ethanol) and water. Generally speaking, alcohol with a concentration of 70%-75% has the ability to kill viruses and bacteria. The concentration of medical disinfection alcohol we use is generally 75%. But the boiling point of ethanol is 78 degrees Celsius, which is lower than water. At the same temperature, ethanol is more volatile than water. Experts pointed out that after the ethanol in the antiseptic alcohol hand sanitizer evaporates, the concentration of alcohol will decrease. When the alcohol concentration is lower than 70%, its disinfection ability will usually decrease.
So, why is the alcohol stored in the alcohol hand sanitizer so volatile?
Experts explained that the main factors affecting the volatilization rate of alcohol are temperature and the tightness of the container. The higher the temperature, the faster the alcohol evaporates. This is because liquids have vapor pressure, which means that at a certain temperature, some molecules in the liquid will run into the air and become gas molecules. The higher the temperature, the faster and more the molecules in the liquid will run into the gas. Compared with the professional storage environment, there are more factors affecting the storage temperature in the home environment, so the possibility of its volatilization is also greater. In addition, the bottle caps produced by some unqualified alcohol hand sanitizer manufacturers are difficult to meet the tightness requirements. As long as the package is opened or left for a long time, the alcohol will evaporate and lose some.
Experts suggest that in order to delay the volatilization rate of ethanol in alcohol hand sanitizer, you can store the hand sanitizer in a lower temperature environment, such as in the refrigerator compartment of the refrigerator, which can effectively reduce the volatilization of alcohol.
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