sulfur hexafluoride

High-Purity Sulfur Hexafluoride (Sulfer Hexafluoride)

Properties and Classification

Appearance: Colorless and odorless gas or liquid UN Number: 1080
CAS Number: 2551-62-4 Liquefied gas

* Refer to MSDS for detailed information on the properties and safety of the product.


Purity wt% Min. 99.999
Water wtppm Max. 3.0
Acids wtppm Max. 0.4
CH4 wtppm Max. 0.3
CO2 wtppm Max. 0.3
Air wtppm Max. 6.0


Item 10L cylinder 47L cylinder
Size Inside diameter 140mm 232mm
Height (to the neck portion) 850mm 1370mm
Height (with a protective cap) * 1000mm 1520mm
Valve nozzle height (center) * 885mm 1400mm
Loading weight 10kg 50kg
Material Manganese steel

* Estimated values for when a standard valve is mounted on a standard cylinder. The accuracy of these values is not guaranteed.


Nozzle size Ø22 mm X 14 right-hand threads
Material BRASS

Physical & Chemical Properties

Item Unit Data
Chemical formula   SF6
Molecular weight   146.06
Boiling point °C -63.89
Sublimation point °C -63.7
°F -82.7
Melting point (223.9kPa) °C -50.8
Liquid density kg/L -1.540
Gas density (0°C, saturated liquid) g/L -
Critical temperature °C 45.6
Critical pressure MPa 3.77
kg/cm2 36.7
Flammability Not applicable
Toxicity   Not applicable
Latent heat of vaporization (0°C, 1013MPa) kJ/kg 117
Maximum permissible concentration (ACGIH) ppm 1000
Explosive limit (in air, 35°C, 101.3 kPa)   -

Temperature - Vapor Pressure Curve