why we use alcohol 70% has decontaminator in biology lab?

Answer:
Disinfecting power peaks at around 70% ethanol (ethyl alcohol); stronger and weaker concentrations have less ability to disinfect. Ethyl alcohol kills organisms by denaturing proteins and dissolving lipids, and so works on most bacteria and fungi, and many viruses.http://en.wikipedia.org/wiki/ethanol#oth...

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coz alcohol dissolves the lipids in the bacterial cell wall and thus kills it!

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We use alcohol because it have many praporty like priservation it is a good vicheal and its help in many reaction and also kill bactaria l

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70% alcohol can cause maximum ionization of bacteria.this property is restricted to 70% %26 even alcohol having strength above 70% has less ionizing power.

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