i have always wondered if DMSO does the job. No fumes, easy storage, but about the nastiest stuff once you get it conterminated with other stuff. https://en.wikipedia.org/wiki/Dimethyl_sulfoxide
we use it to remove fully crosslinked carbon e.g. resist for microtechnology especially after etching (very high temp, sort of). Good thing, gets solid below 18°C and doesn´t produce fumes below 60°C. If pure, you could drink it (lethal dose is higher than for alcohol)