Regular household cleaning and disinfection is very useful for the health and safety of family members. The most commonly used disinfection products are alcohol and 84 disinfectant. But we must buy alcohol with a concentration of 75. If the concentration is too high or too low, it will not be able to disinfect. If you buy alcohol with a concentration of 95, it is best to dilute it with water before use.
1. How many milliliters of water should be added to mix 95 alcohol with 75
How many milliliters of water to add depends on how many milliliters of solution you need to make. 95% alcohol means that in 100ml of alcohol solution there are 95ml of alcohol and 5ml of water, so based on this ratio, the water that needs to be added can be calculated. If you want to mix 100ml of 75% alcohol, you need to calculate the result of (75% x100ml) / 95%, and finally get the result of 78.9ml.
In other words, if you want to mix 100ml of 75% alcohol, you need to pour 95% alcohol into the measuring cup, pour 78.9ml and stop, then pour 21.1ml of distilled water, and finally stir evenly with a stirring rod. Put the diluted 75% alcohol into the watering can and it can be used for disinfection at any time.
2. Can 95 alcohol be used without mixing water?
It can be used, but it has no disinfection effect. It needs 75% alcohol to disinfect, but 95% alcohol cannot disinfect. Because for viruses, high concentrations of alcohol will stimulate the protein to form a protective film, and the antiviral effect is less than that of 75% alcohol. Can be diluted with purified or distilled water and is mineral-free. Dilute in a certain proportion and cap the bottle tightly after use.
3. Why can’t 95% alcohol be disinfected?
75% alcohol is mainly used for sterilization, while 95% alcohol is used for wiping down UV lamps. 95% alcohol cannot be used for disinfection, because if the alcohol concentration is too high, it will quickly dehydrate the protein on the surface of the microorganism before the alcohol penetrates into the microorganism, forming a strong protein protection layer, thereby preventing further penetration of alcohol. This condition actually protects microbes. Therefore, the bactericidal effect of high concentration alcohol is poor.
After long-term practice, scientists finally came to a conclusion: 70-75% alcohol has the best bactericidal effect.
