Iodosyl pentafluoride is an inorganic compound of iodine, fluorine, and oxygen with the chemical formula .
Iodosyl pentafluoride forms a colorless liquid. The molecule of is a distorted octahedron . Its melting point 4.5 ðC.
The compound reacts with graphite to form a black graphite intercalation compound. Iodosyl pentafluoride also forms adducts with arsenic pentafluoride and antimony pentafluoride.