Pentafluoroethyl iodide is a suggested component of a fire-extinguishing composition.US patent application 20010048094 It is a very dense gas.

Production Pentafluoroethyl iodide can be produced by electrochemical fluorination of 1,1,2,2-tetrafluoro-1,2-diiodoethane.

It can also be produced by react tetrafluoroethylene, iodine and iodine pentafluoride.

Properties Pentafluoroethyl iodide is a pungent colourless gas and an anesthetic.

Uses Pentafluoroethyl iodide is an intermediate of preparing other compounds.Google Patents: US3351671A - Preparation of pentafluoroiodoethane - Google Patents, retrieved 7 January 2019.Google Patents: US20080200735A1 - Catalyst for the synthesis of CF3I and CF3CF2I - Google Patents, retrieved 7 January 2019.

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