Alcohol is a chemical reagent. alcohol is one of the chemical disinfectants, and the effective disinfection concentration used in medicine is 75%. 75% alcohol is effective in killing bacteria and viruses. However, alcohol is generally used for local disinfection of the skin and also for disinfection of the surface of objects. However, spraying is rarely used for disinfection. Theoretically, spraying alcohol has a certain effect on killing bacteria and viruses. However, the efficiency of disinfection is very closely related to the concentration and density of the spray. If the concentration of spraying is too low to kill bacteria and viruses. But if the spraying concentration is too high, alcohol is flammable, volatile chemical reagents, there is the risk of explosion and fire when encountering an ignition source. Therefore, alcohol spraying is usually discouraged for disinfection. Content source: Dr. You Lai