Weather minus ten degrees Celsius, water and 95 degrees medical alcohol ratio: concentration of 20% alcohol and 80% water can be.

Each type of alcohol has its own freezing point, which changes depending on the type of alcohol mixed and the type of container. The freezing point of each type of alcohol depends on its own alcohol content; vodka is about 40% alcohol. Wine has an alcohol content of about 14 percent, while alcohol fermented from natural grains has an alcohol content of about 95 percent, which is almost equivalent to pure alcohol.

Water has a freezing point of 0 degrees Celsius, while alcohol has a freezing point of -117 degrees Celsius. The freezing point of alcohol is lower than that of water. When water is mixed with alcohol it becomes a mixture and the freezing point will be below 0 degrees below. After the water is mixed with alcohol, the vapor pressure of the solution will be lowered because there are alcohol molecules occupying the surface of the liquid, which cannot be balanced with the vapor pressure of pure ice, so naturally, it can only be balanced with the vapor pressure of ice at a lower temperature, and the freezing point will be lowered.

Expanded:

The freezing point of medical alcohol is described as follows:

As long as it is an aqueous solution, the freezing point will be lowered by the addition to the water of any substance that can be dissolved; this is a matter of the dependence of the solution, and the details of which are to be found in any book of general or Physical Chemistry or Inorganic Chemistry. 75% ethanol, chlorine disinfectants, peracetic acid, and other disinfectant products that are not subject to special controls are effective in inactivating viruses.

But they are also flammable, poisonous, corrosive and other hazardous properties, which can easily lead to fire, poisoning, burns and other safety accidents if they are not used and stored properly. Alcohol is soluble in water and has a certain fat solubility. Alcohol sterilization mechanism to kill the virus is: the lipid solubility of alcohol can destroy biological phospholipid bilayer composed of biofilm, resulting in biofilm structure and dysfunction caused by death.

People's Daily Online - The use of alcohol will directly affect the effect of sterilization

Baidu Encyclopedia - Medical Alcohol