[Gas] SF6 <General Name > Sulfur hexa-Fluoride

Product summary

SF6 is a colorless, odorless, non-toxic, non-flammable compound with high chemical stability, obtained through chemical reactions between sulfur, and fluorinated gas produced by the electrolysis of anhydrous hydrofluoric acid (HF).
Furthermore, it is a compound with extremely high electrical stability having outstanding dielectric strength and arc-extinguishing performance under high voltages. Even if it were to be momentarily dissociated or ionized by an arc, it has the property of returning to stable SF6 once the arc is extinguished.
It has a relatively high latent heat of vaporization, and a low sublimation temperature, and can be detected even in trace amounts by halogen leak detectors. Its high level of chemical stability and exceptional electrical properties are applied in its use as an insulating material for electrical devices.


An inert, non-flammable, colorless, odorless, and non-toxic gas with outstanding chemical and thermal stability, which will not decompose in anhydrous conditions up to 500°C.
Even if large quantities of water are present between it and metallic materials, it will not decompose in conditions up to 150°C.
It has excellent dielectric strength that is 2 to 3 times that of air at the same pressure, and performance at the same level as insulating oils at 3 to 4 atmospheres of pressure.
It has high arc-extinguishing performance, and even if it is momentarily destroyed by an arc, its insulating properties will be naturally restored if the source is removed.
Also, unlike insulating oils, it will not generate conductive carbon deposits.
It has a high general heat transfer coefficient, and excellent cooling effects, enabling it to reduce energy losses from equipment and increase their output.
These properties can allow equipment to become smaller in size and require less maintenance, for significant potential reductions in cost.
With such exceptional properties, SF6 is believed to be a substance that will be further considered for a diverse range of applications in the future.

General Name : Sulfur hexafluoride
Chemical Formula : SF6

CSCL Number : 1-340
Industrial Safety and Health Act Number : 1-340
CAS NO : 2551-62-4

Main uses

• Gas circuit breakers for electrical insulation, gas insulated substations, electron beam accelerators, electrical transformers, tracers


• Cylinders: 50 kg
• Cylinder bundles: 600 kg

Technical Information

Warnings for use

*Please read the safety data sheet (SDS) before using.


Handle in a well ventilated area.
Seal containers tightly each time they are used.
Do not allow the use of fire, sparks, or high-temperature objects nearby.
Handle in accordance with the High Pressure Gas Safety Act of Japan or your local rules.
If liquefied gas is discharged, it will quickly vaporize, generating large volumes of cold mist that will diffuse throughout the surrounding area.
This mist will be heavier than air and will remain at ground level.


Avoid exposure to direct sunlight.
Store in a well ventilated area.
Store at a distance from fire or heat sources.
Handle in accordance with the High Pressure Gas Safety Act of Japan or your local rules.
Store at temperatures of 40°C or lower.
Store in a cool, well ventilated area (provide ventilation along the floor).
"Manganese steel" can be used as a safe container packaging material.

Production plant

■ AGC Inc. (Japan) Chiba Plant


This product is for industrial use, and was not developed or produced with the intention of use in medical applications.
*Please refer to the SDS for more detailed product information.