Why is 70% alcohol solution a much better disinfectant than a 90% alcohol concentration? Wouldn’t a higher concentration mean better?
In: 5202
Everyone has given correct answers but I will reiterate simply.
70% alcohol has more water content than 90, and as such it’s better able to penetrate cell walls and kill the bacteria/pathogen, while 90% can’t. This is a case where higher isn’t always better.
The water allows the alcohol to access the cells more easily to kill them, less water means it’s less able to do that
90% is better for cleaning electronics because it contains less water.
*edited for grammar
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