Iodosyl trifluoride is an inorganic compound of iodine, fluorine, and oxygen with the chemical formula .

Synthesis Synthesis of iodosyl trifluoride can be done by a reaction of iodine pentoxide with iodine pentafluoride.

Synthesis can be by a reaction of gases:

Or alternately by reaction of iodine pentafluoride with water:

Physical properties Iodosyl trifluoride forms hygroscopic colorless needles. Reacts with water.

Chemical properties Iodosyl trifluoride is hygroscopic and decomposes into and at .

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