Why is 100 alcohol not an effective disinfectant as 70 percent?

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asked Aug 20, 2019 144k views

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Pwn · Answer 1 · 2019-08-26T22:22:20+0000

100% alcohol is extremely flammable and evaporates very fast. It may just dehydrate the microbe and put it in a state where it can still cause harm. 70% will stay on a surface long enough to actually kill harmful microbes.

Why is 100 alcohol not an effective disinfectant as 70 percent?

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