Sulfur hexafluoride

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sulfur hexafluoride

Extremely unreactive gas, formula SF6, which is of entirely anthropogenic origin.

It is used as a dielectric insulator or to provide a chemically inert atmosphere. Due to its inertness, SF6 has a very long atmospheric lifetime (>1000 years) and has been used to estimate the age of stratospheric air. It is also used as a chemical tracer in tropospheric field experiments.

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