Why 70 Percent Alcohol Disinfects Better Than 91 Percent, According to a Microbiologist
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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.
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What we know
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