84 disinfectant and alcohol are both good germicides, 84 disinfectant is mainly for disinfection in daily life, alcohol is mainly for medical disinfection. 84 disinfectant is a chlorine-containing disinfectant with sodium hypochlorite as the main ingredient, mainly used for disinfection of surfaces and environment, etc. Its hydrolyzed hypochlorous acid can oxidize reductive substances, so that microorganisms eventually lose their functions and cannot reproduce or become infected. 84 disinfectant is harmful to human health It is not expensive and is a concentrated solution that needs to be diluted before it can be applied. It can be used to disinfect surgical instruments, thermometers, tableware, tables, chairs, toilets, floors, etc. Because it is an oxidizing agent, it can decolorize fabrics. The main component of medical alcohol is ethanol and it is a mixture. Alcohol mainly denatures proteins to achieve disinfection and sterilization effects. It is widely used in the medical industry and can be used for human skin disinfection. It is easy to volatilize and the best concentration for sterilization and disinfection is 70%-75%, which is safe to contact with human body.