hexafluoride,sulfur 《英文msh词典》Hexafluoride,Sulfur ; [入口词] Hexafluoride,Sulfur ; [主题词] Sulfur Hexafluoride ; [英文释义] Sulfur hexafluoride. An inert gas used mainly as a test gas in respiratory physiology. Other uses include its injection in vitreoretinal surgery to restore the vitreous chamber and as a tracer in monitoring the dispersion and deposition of air pollutants.