95% alcohol cannot be used for disinfection. The concentration commonly used in medicine is 75% alcohol, which can do a good job of disinfecting skin surfaces and disinfecting objects and air. However, the concentration of alcohol over 75% can make the virus or bacteria surface protein instantly solidified, the instantly solidified protein can form a protective shell, or called protective film, which can make alcohol or other disinfectants can not penetrate into the virus, but hinder the disinfection work, so 95% alcohol is usually not used for disinfection. In fact, 95% alcohol is only used as fuel for alcohol lamps in scientific research. If 95% alcohol must be used for disinfection, it should be diluted to 75% alcohol according to the ratio so that it can be used as a common disinfectant for disinfection.