Most likely, as you can re-acquire BoP recipes that are dropped from mobs as well (the kind that you only see with the corresponding profession)
I can confirm that I got
Recipe: Major Arcane Protection Potion two times, once during BC, then again later after I switched to Inscription at WotLK launch, and back to Alchemy a while later.
The "drop" from the jar should behave in the same way, but know that getting it again will certainly be a pita :P and I'm not sure if jars acquired and kept while you are not Alchemy can contain the recipe.