Disinfectants are chemicals in liquid form which destroy micro organisms. They are usually applied to the surfaces of non-living objects in order to kill microbes that are located on those surfaces. Disinfectants are usually used in the hospitals, kitchens, bathrooms, etc to kill infectious microbes. There are different types of disinfectants and the choice of the type to use depends on the kind of microbes involved. Disinfectants are used when there is a possibility that a surface has been infected with infectious agents.