Alcohol Sanitizers Are Different

Why 70% Alcohol Sanitizers are better than 90% - COVID-19

Posted by steve lawrence on Mar 14, 2020

You would think alcohol solutions with a higher percentage would be more powerful at killing germs on your high-touch items like phones and doorknobs, right? A lower percent-alcohol means there’s more water diluting the mix in the bottle. But according to microbiology, 70 percent alcohol is probably more effective than 91 percent for disinfecting—depending on what kind of germs you’re trying to kill.