Sulfur Hexafluoride

Specification

Purity,% IEC 60376 (99.7%) 99.999
Air ≤ 0.2% (m/m)
Carbon tetrafluoride ≤ 0.24% (m/m)
Moisture ≤ 25 ppmw
Acidity (HF) ≤ 1.0 ppmw
Hydrolyzed fluoride (express as HF) ≤ 1.0 ppmw
Mineral oil ≤ 10 ppmw
Biological toxicity test non-toxic
Oxygen
≤1.0 ppmv
Nitrogen
≤4.0 ppmv
Carbon dioxide
≤0.5ppmv
Carbon monoxide
≤0.5 ppmv
Methane
≤0.5 ppmv
Moisture
≤2.0 ppmv
Carbon tetrafluoride
≤1.0 ppmv
Gas fluorocarbon
≤2.0 ppmv
Acidity (HF)
≤0.1 ppmw

transportation    

DOT shipping name Sulfur hexafluoride
DOT classification 2.2
DOT label non-flammable
UN NO. UN 1080
CAS No. 2551-62-4
CGA/DISS/JIS/BS341/DIN477 590 /716/W22-14R/NO.6/NO.6
Transportation status Liquefied gas

Technical Information    

Cylinder condition @ 21.1°C liquid
The combustion limit in the air is not combustible
Natural temperature (°C)-
Molecular weight (g/mol) 146.05
Specific gravity (air =1) 5.11
Critical temperature (°C) 45.54
Critical temperature (psig) 530.49

Application

Sulfur hexafluoride is an excellent inert insulating gas. It is now widely used in high-voltage electrical equipment, underground cables and electronic equipment, gas insulators such as radar waveguides, particle accelerators, transformers, lightning arresters, refrigerants, tracers, medical , Etching in semiconductor manufacturing is the third-generation insulating cooling medium most commonly used in the country after air and oil in the power industry.