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It's not. Absolute alcohol is 200-proof, and is readily available, if you have the license for it. In the 1970s, I ordered 25 gallons of it for the lab I worked in, and National Distillers gave it to for free, to save the paperwork; in truckload quantities, it was something like 90c per gallon.

At 1 atmosphere, fractional distillation can produce alcohol of 95.6% which would be 191.2 proof. At lower pressure, absolute alcohol can be produced.

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Q: Why is 180 the maximum proof of alcohol?
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Will mold grow in 180 proof alcohol?

No, mold will not grow in 180 proof alcohol due to its high alcohol content. The alcohol concentration is too high, making it inhospitable for mold growth.


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Everclear is listed at 180 proof, or 90% alcohol per vol.


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The answer varies in each different liquor, and should be listed on the bottle as "proof". The "Proof" is twice the alcohol percentage, so 40 proof is 20% alcohol, 180 proof is 90% alcohol.


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90 proof means the alcohol content is 45%, by volume.200 proof = 100%180 proof = 90%and so on.


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Yes, if the alcohol has a high enough alcohol has around a 90% potency (180 proof), some times way less can also do good, like a 50% (100 proof) can be effective to disaffectent a wound.


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the higher the proof the stronger - more alcohol - there is. In the UK 70 dgree proof was the standard strength of whiskey - 40% alcohol. 100 proof is 57.1% alcohol. 175 proof is 100% alcohol. In the USA it is different. 100 proof would be 50% alcohol, 70 proof would be 35% alcohol. 200proof would be 100% alcohol. ie double


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