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> 100% alcohol (impossible to obtain unless your a pharmacist because all non-drinking alcohol is poisoned so you can't get drunk without paying a liquor tax)

Only ethanol needs to be denatured. You can easily get 99.953% pure isopropyl on Amazon, and it isn't poisoned because isopropanol is already poison.

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I mean ethanol is denatured by adding methanol, which is also an alcohol, so technically the mixture is still 100% alcohol :-) Except for drawing water due to being hydrophilic etc.

I think sometimes they use acetone.

They don't add methanol. You can check this easily by looking up a Safety Data Sheet. They will add a bittering agent to make it extremely unpalatable.

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