About Sulfur Hexafluoride
Sulfur Hexafluoride (SF6) is an inorganic, colorless, odorless, and non-flammable gas.
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:
99.99% Sulfur Hexafluoride Grade:
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99.99% SF6 Grade Maximum Impurities
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Sulfur Hexafluoride
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99.99%
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Oxygen (O₂)
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<75 ppmv
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Nitrogen (N₂)
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<200 ppmv
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Water (H₂O)
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<5 ppmv
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Hydrolyzable fluoride expressed as HF
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<0.3 ppmv
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Carbon Tetrafluoride (CF₄)
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<75 ppmv
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Toxicity
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No
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99.999% SF6 Ultra High Purity Grade Maximum Impurities
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Sulfur Hexafluoride
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99.999%
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Oxygen (O₂)
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< 2 ppm
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Water (H₂O)
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< 2 ppm
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Carbon Tetrafluoride (CF₄)
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< 2 ppm
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Sulfur Hexafluoride Physical Constants
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Chemical formula
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SF₆
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Molecular Weight
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146.065
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Specific volume @ +70°F (+21.1°C)
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2.648 ft³/lb., 0.165 m³/kg
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Critical pressure
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545.34. psia, 37.59 bar
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Critical temperature
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113.97°F, 45.54°C
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Specific gravity @ 70°F, 1 atm (Air=1)
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5.043
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Hazardous Class
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2.2
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Vapor Pressure
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320 psig
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Boiling Point
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-82.7°F, -63.72°C
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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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Concorde Specialty Gases, Inc.
36 Eaton Road
Eatontown, NJ 07724
Tel: 732-544-9899
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