Sanitizer and why it kills.

Ever wondered why 70% alcohol is used in sanitizer and not 99% alcohol. It seems better to use pure alcohol than 70% diluted, well if you too think so then you are wrong.Suppose we pour pure alcohol over a single celled organism the alcohol will enter the Cell Wall and coagulate the protein just inside the cell wall very quickly creating a coagulated ring between the cell wall and other parts of the cell. Thus this already coagulated protein prevents further penetration of alcohol in the cell and the cell enters a dormant state.Whereas 70% diluted alcohol coagulates proteins but at slower rate, so slow that it reaches all the way through cell before it could be blocked. Thus the entire cell is coagulated and the organism dies

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