I raised the example of dissociation of the tribasic mescaline citrate as a potential outcome in the titrated aliquots experiment that I outlined. If freebase mescaline in EA were to be mixed with one third of its molar equivalent of citric acid and the solvent then be allowed to evaporate a solid that is theoretically the tribasic citrate would be produced. I would predict that washing the resulting solid(? - see below) with fresh EA would result in mescaline freebase being washed out of the solid material, especially perhaps if the solvent was a bit damp.

A similar question is whether dibasic mescaline citrate behaves similarly. The outcomes of these two experiments would help us to home in on the stoichiometry. And a 3:2 ratio of mescaline to citric acid subjected to the same regimen would, hopefully, act to bolster the evidence.

This make me think the stoichiometry could be a factor behind the necessary loading of citric acid required for the crystals to start forming. Trimescaline citrate and/or/mixed with bimescaline citrate could possibly be room temperature liquid eutectics or something similar. This potentially renders one or both of them soluble in the EA [This figures, in my view, because the material is proportionally mostly mescaline, if that makes sense]. Thus, precipitation only starts once sufficient citric acid is present in the solution at a ratio in considerable excess of one mole of citric acid per two moles of mescaline, up to at least a one to one ratio - and, as has been found, more if a higher level of plant impurities is present.