The concentration of alcohol used for clinical disinfection is about 75%, 75% alcohol is the best for virus killing, 95% alcohol is not effective, so sometimes only 95% alcohol needs to be diluted to 75% to achieve the best disinfection effect. 95% alcohol diluted with water, the specific amount of water added is mainly based on the 95% alcohol volume for the formula conversion, such as 100ml after the formula calculation After that, you need to add about 26.6ml of water to reach 75% concentration. If it is other volume of alcohol volume, and then according to the formula to calculate the approximate amount of water, you can calculate. Content source: Dr. Yurai