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Which kills bacteria and germs better - Rubbing Alcohol 70% or 91% strength ?
Posted by: Inquiring mindz wanna know ()
Date: November 17, 2019 12:48PM

Well?

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Re: Which kills bacteria and germs better - Rubbing Alcohol 70% or 91% strength ?
Posted by: 91 % Is The Best ()
Date: November 17, 2019 01:16PM

Far better then 70% . 70 is rubbing alcohol it will kill germs but not as well as 91 %. 91% is also more expensive then 70%

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Re: Which kills bacteria and germs better - Rubbing Alcohol 70% or 91% strength ?
Posted by: Wrong.... ()
Date: November 17, 2019 01:37PM

You had a 50/50 chance. Try again.

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Re: Which kills bacteria and germs better - Rubbing Alcohol 70% or 91% strength ?
Posted by: kjwck ()
Date: November 17, 2019 01:42PM

Why Is 70% the Most Effective Concentration of Isopropyl Alcohol for Disinfection?

Isopropyl alcohol, particularly in solutions between 60% and 90% alcohol with 10 – 40% purified water, is rapidly antimicrobial against bacteria, fungi, and viruses. Once alcohol concentrations drop below 50%, usefulness for disinfection drops sharply. Notably, higher concentrations of alcohol don’t generate more desirable bactericidal, virucidal, or fungicidal properties.

The presence of water is a crucial factor in destroying or inhibiting the growth of pathogenic microorganisms with isopropyl alcohol. Water acts as a catalyst and plays a key role in denaturing the proteins of vegetative cell membranes. 70% IPA solutions penetrate the cell wall more completely which permeates the entire cell, coagulates all proteins, and therefore the microorganism dies. Extra water content slows evaporation, therefore increasing surface contact time and enhancing effectiveness. Isopropyl alcohol concentrations over 91% coagulate proteins instantly. Consequently, a protective layer is created which protects other proteins from further coagulation.

Solutions > 91% IPA may kill some bacteria, but require longer contact times for disinfection, and enable spores to lie in a dormant state without being killed. A 50% isopropyl alcohol solution kills Staphylococcus Aureus in less than 10 seconds (pg. 238), yet a 90% solution with a contact time of over two hours is ineffective. Some disinfectants will kill spores with exposures times that exceed 3-12 hours, which are classified as chemical sterilants.

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Re: Which kills bacteria and germs better - Rubbing Alcohol 70% or 91% strength ?
Posted by: and it's free ()
Date: November 17, 2019 01:47PM

Direct sunlight. Dry air. Staying away from nasty people and anywhere they frequent.

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