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OfflineSigno
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99 Percent Rubbing Alcohol.
    #2064150 - 11/02/03 03:15 AM (13 years, 1 month ago)

I got 99% rubbing alcohol. Will this work in lieu of the regular 91% for sterilizing purposes?


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OfflineMikeShrooms
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Re: 99 Percent Rubbing Alcohol. [Re: Signo]
    #2064168 - 11/02/03 03:25 AM (13 years, 1 month ago)

Yes


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Invisibleralphster44
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Re: 99 Percent Rubbing Alcohol. [Re: Signo]
    #2064253 - 11/02/03 05:01 AM (13 years, 1 month ago)

The regular is 70%

No need for anymore concentrated solution.


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Invisiblemicro
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Re: 99 Percent Rubbing Alcohol. [Re: ralphster44]
    #2064695 - 11/02/03 12:44 PM (13 years, 1 month ago)

Like Ralphster said. 70% will actually work better -- a 99% solution can actually just stun cells and not kill them. 91% is ok, too.

We use 70% when working with infectious diseases.

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Offlinelysergic
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Re: 99 Percent Rubbing Alcohol. [Re: micro]
    #2065165 - 11/02/03 03:34 PM (13 years, 1 month ago)

I recommend the highest percentage that you can use.


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Offlinelysergic
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Re: 99 Percent Rubbing Alcohol. [Re: lysergic]
    #2065171 - 11/02/03 03:36 PM (13 years, 1 month ago)

to answer the question, no concentration o falcohol, sprayed, wiped misted or used as a dunk solution, will result in guaranteed "sterility"


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Invisiblemicro
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Re: 99 Percent Rubbing Alcohol. [Re: lysergic]
    #2065222 - 11/02/03 03:51 PM (13 years, 1 month ago)

So, Lysergic -- what's your point? Ditch the alcohol?

70% and 91% alcohol work the best. I work with infectious diseases, so I know a bit about killing germs. A 10 or 20% bleach solution is supposed to work better, but it isn't good for most surfaces.

I don't think the person was asking if he could sterilize a room with rubbing alcohol. I think he was asking if a 99% concentration is better at killing things. The answer is no -- it's actually less efficient.

I'm sure there's something on PubMed you could look up relating to this.

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InvisibleSixCee
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Re: 99 Percent Rubbing Alcohol. [Re: micro]
    #2065305 - 11/02/03 04:30 PM (13 years, 1 month ago)

Wow that's seems strange to me. Can you explain this?


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Invisiblemicro
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Re: 99 Percent Rubbing Alcohol. [Re: SixCee]
    #2065379 - 11/02/03 04:54 PM (13 years, 1 month ago)

I don't think anyone knows the exact reason (especially since noone knows every mechanism of action of alcohol on cells) but alcohol is thought to, for one thing, denature proteins and. Without any water lipophyllic proteins won't denature as easily.

This is all speculation, but tests have been done by scientists to show that 70% alcohol is more effective than 100%

(91% is supposed to work as well.)

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Invisibledaussaulit
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Re: 99 Percent Rubbing Alcohol. [Re: micro]
    #2065446 - 11/02/03 05:20 PM (13 years, 1 month ago)

Alcohols are commonly used topical disinfectants. They effective against Gram + and Gram - bacteria, fungal spores, and enveloped viruses. Alcohols are not effective against bacterial spores and non-enveloped viruses. Alcohols require time to work and they do not penetrate organic material.

Note, bacteria can remain dormant for centuries. It can also survive decades being inside a freezer-dryer. It can also stand boiling water. Because the endospore is so protective, it's hard to kill.

Now, when the bacteria touches 91%-100% isopropyl alcohol(rubbing alcohol), because there is a very low water content. This will enable the bacteria to produce the spores very quickly because it is "stronger" and provides a harsher environment.

When the bacteria touches the 70% alcohol, it's not as "strong" or harsh to the bacteria. Because the conditions aren't as adverse, the production of the spores will be slower, allowing more time for the alcohol to kill the bacteria.


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