Why is 70% alcohol solution a much better disinfectant than a 90% alcohol concentration? Wouldn’t a higher concentration mean better?

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Why is 70% alcohol solution a much better disinfectant than a 90% alcohol concentration? Wouldn’t a higher concentration mean better?

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Other than what the top comment explained, 70% is the magic number if you don’t want your disinfectant to evaporate before it actually disinfects. Those who have problems with dry skin also use 60% if needed.

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