That’s interesting, I’m keen to give it a go once I get hold of some raws. BA is used as a solvent in injectable estered combined with oil in concentrations of 250mg/ml. May also be an interesting experiment to try mixing 25% MCT oil, 25% DMSO, 50% BA to make a 100mg/ml transdermal solution.Funny you mention it that was exactly going to be my next experiment as I have the same intuition.
Solubility would be better, and skin burning from 100% DMSO would probably be alleviated by doing 50/50.
I haven't seen any figure for DMSO solvency's rate, but from experience I would say somewhere in between ethanol and BA, as there are definitely some residues when attempting 100mg/ml DHT in DMSO, whereas there are no crystals left when doing 100mg/ml in BA.