Alcohol percentages - Deepstash
Why 70 Percent Alcohol Disinfects Better Than 91 Percent, According to a Microbiologist

Why 70 Percent Alcohol Disinfects Better Than 91 Percent, According to a Microbiologist

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Alcohol percentages

  • To fend off bacteria, a 70 percent alcohol solution with water in it allows it to cross a cell membrane and kills the entire cell.
  • Viruses with an envelope structure, including the new virus, can be deactivated by alcohol solutions of 60 percent.
  • Any concentration of alcohol won't effectively target the norovirus.

Rubbing alcohol

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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