Why 70 Percent Alcohol Disinfects Better Than 91 Percent, According to a Microbiologist
Depending on what kind of germs you’re trying to kill, 70 percent alcohol is probably more effective than 91 percent for disinfecting.
A 90 percent alcohol solution is too powerful in some cases. It kills the outside of the cell before it can get into the inside and kill the actual germ.
"What is called genius is the abundance of life and health." - Thoreau
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