making oil

Hello everyone. First post here
I made a wash with 90% food grade ethanol and then put the liquid in a pan in the home oven at 90C to evaporate the ethanol to get an oil. The alcohol did not appear to be boiling. just tiny bubbles on the sides of the pan.
When it was reduced to quarter the amount i moved the liquid to a smaller container and put it back in the oven to continue evaporation.
However, I fell asleep and woke up hours later to find a bubbly oil at the bottom of the jar.
Did i partially decarboxylate it? because as far as i know prolonged exposure to a temp of 90 will start decarboxilation.
Am I better off to continue decarbing it and using it in edibles?

A conventional oven is not a good place to boil off ethanol because of its flammability.

90C is definitely hot enough to decarboxylate so you may be at least partially decarboxylated. It will still work for vaporizing, and as you note, will work for edibles decarboxylated.

Yes, it'd cooked, you can dilute it with coconut oil. I recently discovered that 100% acetone works better than even pure ethanol. It's also easy to evaporate off, just place it on top of a pan with some hot water or just leave it out. Whereas ethanol makes a runny oil, then one looks oily on the plate but then crystallises as you scrape it up.