SULFUR HEXAFLUORIDE
General Characteristics
Sulfur hexafluoride is a colourless, odorless, nontoxic gas. It is readily liquefied and is shipped in steel cylinders as a liquefied gas under its own vapour pressure.
Physical Information
Molecular Weight
146.1
Flammability Limits in air
Nonflammable
Specific Gravity,
Gas @ 70&degF(21.1&degC),
1 atm(Air=1)
5.11
Density,
Gas @ 70&degF
(21.1&degC), 1 atm
0.385lb/ft^3 (6.2g/l)
Specific Volume,
Gas @ 70&degF
(21.1&degC), 1 atm
2.6ft^3/lb (163ml/g)
Sublimation Point @ 101.3 kpa
-82.7&degF (-63.7&degC)
Melting Point @ 224 kpa
-59.4&degF (-50.8&degC)
Critical Temperature
114&degF (45.5&degC)
Critical Pressure
545.2 psia (37.6 bar)
Toxicity (as HF, a 4 to 1 ratio)
TWA
Simple asphyxiant
1,000 ppm (OSHA)