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The SF6 purity is >99.9%, 99.99%,99.999%; Formula: SF6; CAS number: 2551-62-4
SF6 is one of the most popular insulating gases (next to air) . It has a number of nice properties: it's not flammable, it's non-toxic, it's (moderately) inexpensive, it's a good insulator (being an electronegative gas) , with a breakdown strength of about 3 times that of air. At normal temperatures, it is non-corrosive, and is fairly inert, although at temperatures above 500C, it decomposes, and the decomposition products (Fluorine(!) ) react with just about anything, especially any water vapor.