Sulfur hexafluoride (SF6) or sulphur hexafluoride is a synthetic fluorinated compound with an extremely stable molecular structure. UN 1080 CAS 2551-62-4 MF F6S Melting point� â??50� �°C(lit.) Boiling point� â??64� �°C1� mm Hg(lit.) density� 6.602 NANJING ZL ENERGY CO.,LTD. specialize in Isobutane R600a, Propylene, Ethane, Cyclopentane, 1-hexene and Isooctane, etc. We look forward to your inquiry if any needs.