Sulfur Hexafluoride

Concorde Specialty Gases

About Sulfur Hexafluoride

Sulfur Hexafluoride (SF6) is a synthetic, colorless, odorless, non-flammable gas.

Sulfur Hexafluoride primary use is in the electrical industry as a gaseous dielectric medium for various voltage circuit breakers SF6’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% (4N) Technical Grade: For Gas Insulated Switchgear (GIS) and other High and Mid-Voltage Electrical Applications

Industrial Grade Maximum Impurities
Sulfur Hexafluoride	99.99%
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
Toxicity	No

99.999% (5N) Ultra High Purity Grade SF6: For Semiconductor and Advanced Manufacturing Applications

Ultra High Purity Grade SF6 Maximum Impurities
Sulfur Hexafluoride	99.999%
Oxygen (O₂)	< 2 ppm
Water (H₂O)	< 2 ppm
Carbon Tetrafluoride (CF₄)	< 2 ppm

Appearance and 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	SF₆
Molecular Weight	146.065
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)	5.043
Hazardous Class	2.2
Vapor Pressure	320 psig
Boiling Point	-82.7°F, -63.72°C

Variety of Sizes in stock and ready for shipment:

5LB, 11LB, 18LB, 20LB, 25LB, 27.5LB, 35LB, 38LB, 45LB, 50LB, 57LB, 70LB, 90LB, 115LB and 1150LB. Custom Fill available upon request.

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

We Provide:
SF6 Gas
Recycled SF6 Gas
SF6 Gas Blends
CF4 Gas
Xenon Gas
Krypton Gas
Helium Gas
Dry Air
Custom Gas Blends

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Concorde Specialty Gases Brochure

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