Tin(IV) iodide, also known as stannic iodide, is the chemical compound with the formula SnI4.

This tetrahedral molecule crystallizes as a bright orange solid that dissolves readily in nonpolar solvents such as benzene.

[3] In aqueous hydroiodic acid, it reacts to form a rare example of a hexaiodometallate:[2] Tin(IV) iodide is an orange solid under standard conditions.

[4] This corresponds approximately to a cubic close packing of iodine atoms in which 1/8 of all tetrahedral gaps are occupied by tin atoms.

This leads to discrete tetrahedral SnI4 molecules.