75% alcohol is a very important disinfectant used in hospitals for disinfecting, mainly for topical disinfection of the patient’s skin. Even in hospitals, spraying alcohol for disinfection is never permitted because alcohol is flammable and there are potential risks in the process of spraying alcohol, so spraying is discouraged as a method of disinfecting the environment. Spraying alcohol on the environment does have a disinfecting and sterilizing effect, but due to and the density and concentration of spraying alcohol is very closely related, if the concentration is not enough, can not play a bactericidal, sterilization effect. At the same time, it should be noted that the spraying of alcohol has a potential risk, the environment after the alcohol spraying once the fire, there may be the risk of ignition or explosion. Source: Dr. Yurai