That colouration is exactly how pure Freebase Bufo looks, so would not worry more about colour.

And also no big weight drop, probably just fine now!

Probably this decomposition cant be avoided completely. Also the TGA vaporization profile of the "-Benzoate does not drop near 0 % like other "well-evaporating" Alkaloids, but also stops at ~ 30 %.

Regarding the process:

I think now here there is no other true option than doing the Xylene-"Trick". No solvent can reliably crystallize it and even the Naphtha-EA mixture is bad, because solubility only drops to 1/3 or 1/4 at -20 °C. But with Xylene it drops to like 1/100. Limonene should be equally usable in theory, but it look always that I just destroyed the Bufo ... if trying must definetly stop at ~ 150 °C, more is unnecessary and quickly turns it black, same reaction like when smoking.

And testing a Freebase-E-Juice might be a great idea. So while I thought Freebase Bufotenin always decomposes strongly upon heating, it might not be the case for an E-Juice. When running the vaporization without Oxygen, it perfectly vaporizes. So reaction is definetly Oxidation-driven. But I dont think that this is just a mono-molecular process like Bufotenin -> Bufotenin-N-Oxide, but rather something that is only enabled by involving the R-OH. Otherwise also DMT would show this bad evaporation.

So very likely the decomposition is a oxygen-driven Oligomerization (sadly could not get any more details when I tried to provoke it and analyzing the residue), not proven, but probably most likely. And this of course occurs the fastest in a high concentration and evaporation of a pure Freebase oil = MAX concentration you could get anyways :twisted: :twisted:

So long story short: I think it's very likely that making an E-Juice from Freebase Bufotenin will maybe not show any decomposition or maybe at least greatly reduced. I said with the Benzoate there might not be a reason to ever go to the Freebase, but maybe the Freebase in E-Juice would show even LESS decomposition than pure Bufo Benzoate.

As I understand an E-Juice cant give you a rocket shoot, as the dose builds up slowly. But with pure Bufo a very big hit - at least for me - was anyways not possible with the pure Freebase. So maybe that might be an interesting alternative??

Simply if the long-term stability is not ideal, then what could still be tried is Bufo-Freebase in PG + Benzoic Acid in PG (with little excess of Bufo to be safe not vaping acid). Maybe formation in PG causes no precipitation and then it might be a Bufo-style E-Juice with longer shelf life ...

Great results definetly. But is there no vasoconstriction or similar effects? I often felt cold feeling in hands / forehead and unpleasant tingling ... :thumb_dow

Yes with Benzoic Acid the Aceton must be super dry at the end, the Benzoate should be super soluble in water, so any residual water should make problems when adding Benzoic.