the concentration of alcohol commonly used for disinfection is 75%.

you can't use too high concentration. If the concentration is too high, it will irritate the skin, and 75% of it is mild and safe for the skin.

alcohol is an organic compound, its scientific name is ethanol, and its molecular formula is C2H5OH. The molecules of alcohol have great permeability, which can penetrate the membrane on the surface of bacteria and penetrate into the interior of bacteria, so that protein, which is the basis of bacteria's life, is solidified and bacteria are killed.