Sulfur Hexafluoride

Concorde Specialty Gases

About Sulfur Hexafluoride

Sulfur Hexafluoride (SF6) is an inorganic, colorless, odorless, and non-flammable gas.

Sulfur Hexafluoride primary use is in the electrical industry as a gaseous dielectric medium for various voltage circuit breakersSF6’s primary use is in the electrical industry as a gaseous dielectric medium for various voltage circuit breakers, switchgear, and other electrical equipment, often replacing oil-filled circuit breakers (OCBs) that can contain harmful PCBs.  SF6 gas under pressure is used as an insulator in gas insulated switchgear (GIS) because it has a much higher dielectric strength than air or dry nitrogen.  This property makes it possible to reduce the size of the electrical gear significantly.


Sulfur Hexafluoride Safety Requirements:

The cryogenic liquid will rapidly boil to the gas at standard temperatures and pressures.  The liquefied gas can cause frostbite to any contaminated tissue.  The main health hazard of releasing this gas is asphyxiation by oxygen displacement (see SDS for further information).



99.99% Sulfur Hexafluoride Grade:


  99.99% SF6 Grade Maximum Impurities
Sulfur Hexafluoride
Oxygen (O₂)
<75 ppmv
Nitrogen (N₂)
<200 ppmv
Water (H₂O)
<5 ppmv
Hydrolyzable fluoride expressed as HF
<0.3 ppmv
Carbon Tetrafluoride (CF₄)
<75 ppmv


 99.999% SF6 Ultra High Purity Grade:
  99.999% SF6 Ultra High Purity Grade Maximum Impurities
Sulfur Hexafluoride
Oxygen (O₂)
< 2 ppm
Water (H₂O)
< 2 ppm
Carbon Tetrafluoride (CF₄)
< 2 ppm
Appearance, Safety Requirements:  Colorless gas, compressed under pressure.  Non-flammable, non-explosive, has a moderate general toxic action in inhalation contact.
  Sulfur Hexafluoride Physical Constants
Chemical formula
Molecular Weight
Specific volume @ +70°F (+21.1°C)
2.648 ft³/lb., 0.165 m³/kg
Critical pressure
545.34. psia, 37.59 bar
Critical temperature
113.97°F, 45.54°C
Specific gravity @ 70°F, 1 atm (Air=1)
Hazardous Class
Vapor Pressure
320 psig
Boiling Point
-82.7°F, -63.72°C


Downloads Sulfur Hexafluoride Gas – Material Safety Data Sheet

SF6 – Concorde’s Spec. February 14, 2020
SF6, Sulfur Hexafluoride Industry Specifications pdf.
SF6 Gas – Safety Data Sheet



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In Stock and ready o ship worldwide: SF6 Gas global provider - Concorde Specialty Gases, 36 Eaton Road, Eatontown, NJ 07724 USA

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5KG, 10KG, 12.5KG, 40KG and 50KG. Custom Fill available upon request.

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Concorde Specialty Gases
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