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disinfectant


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#1 genugene

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Posted 26 October 2004 - 04:38 AM

can anyone help me to resolve why 70% alcohol is preferred as disinfectant and sterilizing agent over absolute alcohol?
thanks in advance

#2 bob1

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Posted 28 October 2004 - 05:18 PM

Tradition and cost would be my guesses.

#3 Simonsays

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Posted 29 October 2004 - 12:47 PM

In fact, it is not only a question of cost as many would think!!
70% ethanol actually sterilize by precipitating the intracellular bacterial proteins, wich kills them. 100% ethanol is too strong and doesn't "have the time to enter" into the bacteria, so it only precipitate extracellular protein, and it doesn't kill it.

That's what I heard anyway!?!

Simon




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