Perfluorooctane (C8BrF17), CAS: 423-55-2, also known as 1-bromo-perfluorooctane, 1-bromo-heptafluorooctane, melting point of 6℃, boiling point of 142℃, colorless transparent liquid. Perfluorooctane has the characteristics of high density, low viscosity, low surface tension, non-combustible, non-toxic, high chemical stability, high electrical insulation and so on.