HP Gas

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
High-Purity Sulfur Hexafluoride (Sulfer Hexafluoride)


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

High-Purity Sulfur Hexafluoride (Sulfer Hexafluoride)