I know none of these are "safe" because even ethanol is neurotoxic, but lets just say a similar safety profile to alcohol. I'm looking into 1,4-Butanediol and GBL, the former seems way easier to get as it's used in cosmetics. I've heard with GBL, like GHB, you know have to fill out DEA requests to legally purchase it. I'm willing to semi-legally purchase it, i.e. just not tell the DEA, but I don't know how big of a crime that is. Also looking into higher alcohols like 2m2b and propanol, which are supposed to theoretically be even safer than ethanol. Anyone have experience with them? Are they qualitatively different than ethanol or just more potent? Is the high cleaner? Is the taste bearable? Lastly, and I know this the most dubious, thinking of going about getting ether/chloroform. Are there any other solvents that are as safe(ish) as these two are? I know they're not safe per say but they're a lot better than most other solvents I've read about like toluene, HFCs, etc. Would like to know more about this subject in general and especially would like to know about chemicals which I haven't mentioned, because I've pretty much said all the ones I know.