First off, I really have no desire to argue with you.
I looked at the bottle of denatured alcohol that I keep in the shop. The label does not state which type of alcohol it is, but I took a quick sniff of it then sniffed some Isopropyl "rubbing alcohol" and they smell similar. The rubbing alcohol is marked 70% on the label. The denatured alcohol label is marked as 190 proof AND "Completely Denatured Alcohol", which probably means it is as denatured as can be made. I do not know that 200 proof alcohol could be achieved. I was curious as to how alcohol proof and percentages are related, so I did a search for "alcohol proof table" and came across this "Proofing Table":
The table is for ethyl aka ethanol alcohol. There are some specific gravity i.e. weight differences and chemical composition differences between isoprohyl and ethanol alcohols, but I think even with those differences there would be similarities between proof and percentages. I think that rubbing alcohol is a lower percentage of alcohol than that which is sold as denatured and that was what I tried to determine. They may indeed both be a type of Isopropyl. I was under the impression that they were somehow different in chemical makeup. My bad!
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