Sulfur Hexafluoride (SF6) is a colorless and odorless gas that is slightly soluble in water. It is manufactured by a direct combination of sulfur vapor and fluorine. It is toxic only in high concentrations and it has a limited industrial use as a dielectric fluid.
| Molecular weight: 146.05 | Critical temperature:318.7 K |
| Melting point: 222.5 K | Critical pressure:3.76 MPa |
| Boiling point:209.3 K | Critical density:738 kg/m3 |
| Normal vapor density:6.52 kg/m3 | (@0°C, 101.3 kPa) |