a couple of quick thoughts
when traveling with an alcohol stove, trangia, sometimes you end up finding only large bottles of some sort of alcohol, 1.5 L or more, but if it whats available, you take it and then decide if you want to carry it all. I mention this more from a weight thing, but sometimes practicality comes into play, ie not knowing how easy it will be to find more , so you carry more than you really need. I've had this happen in France and in some Latin American countries.
Plus, sometimes its just worth the hassle of carrying more, knowing that you won't have to track down a store with it sometime in the future.

Also, sometimes language issues come up and what people answer when you ask can be for quite different alcohol.
Ive used low grade rubbing alcohol sometimes, the 70% stuff, and its more sooty than higher grade stuff. The really good stuff sometimes can only be found in medical supply places, because in some countries high percentage alcohol sales is regulated (use in illegal stuff I guess). For example, in Guatemala City, I went to numerous big pharmacies, but kept being told that higher quality alcohol was only in medical supply places, but my Spanish was good enough to understand this and to get an address for a very controlled place where I went and got a litre of it.

also, if all these questions are about doing your high mountain trip idea, in a lot of developing countries, fuel is often sold at the side of the road in plastic coke bottles etc, gasoline, diesel. Ive bought alcohol like this from asking around and buying it from some lady in a doorway, in a coke bottle, and not really knowing what sort of quality, percentage of alcohol it is, but in a pinch, you take what you can get when you need it.

there used to be a webpage somewhere with different alcohol words in different countries, so look up trangia or alcohol stove fuel terms, or something like that, you should find it.
I can attest that people call various trangia/alcohol burning stove fuels very different names, and paint supply places can be a source also, but it can be tricky with the actual words that are used, so you do have to be careful (from a safety aspect)

so just be careful of wording and what the average Joe Smith will understand and tell you.