High-efficiency disinfectant can kill all bacterial reproductive body (including mycobacterium), viruses, fungi and their spores, bacteria also have a certain bactericidal effect, to achieve a high level of disinfection requirements, including chlorine disinfectant, ozone, methyl ethyl urea compounds, double chain quaternary ammonium salt. The disinfectant can only kill the microorganism such as Mycobacterium, fungus, virus and bacterium, and reach disinfection requirement, including iodine disinfectant, alcohol disinfectant, phenol disinfectant, etc. The inefficient disinfectant can only kill the bacteria reproductive body and the virus, to meet the requirements of disinfectants, including ammonium bromide and other quaternary ammonium salt disinfectant, chlorhexidine (chlorhexidine), such as Metformin, mercury, silver, copper and other metal ions disinfectant and Chinese herbal medicine disinfectant. The definition of disinfectant refers to the agent used to kill pathogenic microorganisms in the media to achieve harmless requirements, it is different from antibiotics, its main role in the prevention of disease is to eliminate pathogenic microorganisms in the human body, cut off the transmission of infectious diseases, to achieve control of infectious diseases. Disinfectants are often called "chemical disinfectants".