Industrial alcohol cannot be disinfected after dilution. In addition to ethanol, industrial alcohol also contains a lot of methanol, formaldehyde and other impurities. If industrial alcohol is diluted and sprayed on the surface of an object or used to wipe it, the methanol and other harmful substances contained in it are highly toxic and can enter the human body through the respiratory tract and skin and produce toxic reactions, so not only does it not work as a disinfectant, it may even damage human health, and in serious cases such substances can cause damage to the human nervous system or blood system and cause disease. Industrial alcohol should not be used for disinfection after dilution.