Sulfur Hexafluoride

**Definition:** 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.

**Tree numbers:** - D01.303.350.300.900 - D01.362.820 - D01.875.812