Ethanol is medical alcohol, medical alcohol is the alcohol used in medicine, the basic component is ethanol. Medical alcohol volume concentration is different, the role of different, commonly used concentration of 95%, 75% two, as follows: 1, 95% of alcohol: that is, anhydrous alcohol, the main role is dehydration denaturation, the tissue, cells have a fixed role, commonly used in pathology section, pathology wax film production; 2, 75% of alcohol: the main role is disinfection, such as before the operation, disinfection before injection and disinfection of the work environment are available to 75% alcohol. In addition, you can also mix the medical alcohol into 50% alcohol, high fever patients can be used to wipe the skin, have a cooling effect.