I'd like to share a bit of info I recently learned. I think we all know what EtOH is. It's alcohol. Most, maybe all of us knows that it means ethanol, the specific kind of alcohol in alcoholic beverages (as opposed to, say, isopropyl alcohol, another kind of alcohol found in rubbing alcohol but is not, or at least shouldn't be, consumed as a beverage). But what does EtOH actually stand for? All those letters are present in the word "ethanol" but not in the order they are in "EtOH". After asking several other EMS providers what exactly does EtOH mean and getting no real answers, I decided to look it up for myself, and here's what I learned. The word "ethanol" itself is a shortened form of "ethyl alcohol" (technically it's a bit more complicated than just a shortening). Ethyl is a group of organic chemicals. The base ethyl molecule is C2H5. The molecular formula of ethyl alcohol is C2H5OH, or written another way (emprically) it's C2H6O (there are other ways of writing it as well). However you write it, you can see that ethyl alcohol has one additional oxygen atom and one additional hydrogen atom compared to the base ethyl molecule. In organic chemistry, the ethyl group is written simply with the notation of "Et", and then whatever else is part of the molecule is appended onto the end. Since ethanol has an additional oxygen and hydrogen atom, that's where the O and the H comes from. Thus, "EtOH". Note that strictly speaking, it should be written just like that, all capital letters except for the "t". So there you have it. You now know exactly what EtOH is in a technical sense that I'd bet not many of your colleagues know.