Nope, strange potion (combined with the other strange potion creates Emu Eartes Sues, for the "imp needs potion" quest).
Normally permanent potions are and remain permanent. Guess, yoou stumbled over a bug.
The alchemist => as soon as you find him (not in Imp Village) he will ask for 3 ingredients, not potions <img src="/ubbthreads/images/graemlins/winkwink.gif" alt="" />
Kiya
