Alcohol is suitable for general disinfection of object surfaces for hand and skin disinfection, not for air disinfection. The alcohol used for hand and skin disinfection is 75% alcohol, which can be applied to finger skin 1-2 times with the original solution for 1-3 minutes. 95% medical alcohol is mainly used for disinfection and immersion of instruments. The disinfection alcohol used in the home should be 75% medical alcohol, which can be used for disinfection of door handles, countertops, cell phones, glass windows, stair handrails, elevators and other object surfaces. However, it can only be used for wiping disinfection, not spraying, so as not to cause fire accidents. After using alcohol disinfection to open windows and ventilate in time, and away from fire sources, alcohol is required to be sealed and stored.