Sulfur Hexafluoride SF6 CAS No.: 2551-62-4 EINECS No.: 219-854-2 UN No.: UN1080 Purity: 99.995%-99.999% Dot Class: 2.2 Appearance: Colorless Grade Standard: Electronic Grade, Industrial Grade Dielectric medium: SF6 is used in the electrical industry as a gaseous dielectric medium for high-voltage circuit breakers, switchgear, and other electrical equipment, often replacing oil f illed circuit breakers (OCBs) that can contain harmful PCBs. Medical use: SF6 is used to provide a tamponade or plug of a retinal hole in retinal detachment repair operations in the form of a gas bubble. Tracer compound. as an etchant, as inert gas to fill casting forms, as a filler gas in tennis balls and so on. - -