ah, that would then be a truth in advertising issue.
it’s either “crude” or it’s been post processed. chromatography IS post processing. so the thc free “crude” you are seeing advertised is not in fact crude, or is not in fact thc free.
yep. given that the synthase enzymes for THCA and CBDA are evolutionarily related to each other, and have been shown to produce each other’s products in-vitro, it is pretty unlikely that genetics will get you there. but artificial selection is a very powerful tool, especially if combined with a mutagenesis strategy. so I wouldn’t rule it out entirely.
any chromatographic step that can separate those two very similar molecules from each other, is also going to separate them from pretty much everything else as well. Once you separate the cannabinoids via chromatography, you have also separated them from pretty much everything else in the jar.
it’s no longer crude, it’s isolate.