# Sulfur hexafluoride, SF6

Sulfur hexafluoride (SF6) is a colorless, odorless, non-toxic, and non-flammable gas that is renowned for its excellent electrical insulation properties. It is often used in high-voltage electrical equipment as an insulating and arc-quenching gas because of its ability to cool and extinguish electrical arcs. This makes SF6 essential for applications such as switchgears, circuit breakers, and transformers. The gas is also utilized in the magnesium industry to prevent the oxidation of molten magnesium and in the semiconductor field for plasma etching processes. Due to its high global warming potential, there are ongoing efforts to find alternatives and reduce the amount of SF6 released into the atmosphere. In optical applications, it can be used for its dense, heavy properties, which can modify the speed of sound and refractive indices of the gases it's mixed with.

## Other names

- Sulfur(VI) fluoride
- Elagas
- Esaflon
- Hexafluoro-λ6-sulfane

## External links

- Sulfur hexafluoride - Wikipedia
- Sulfur hexafluoride - PubChem
- Sulfur hexafluoride - NIST Cemistry WebBook