碘化铝、三碘化铝是铝的碘化物，化学式为AlI₃，可通过单质化合或铝与碘化氢反应制取。碘化铝为强路易斯酸，具腐蚀性，且水解也会生成腐蚀性的碘化氢，需要隔绝空气储存。

碘化铝可以在空气中燃烧，产生桔红色火焰，其蒸汽和空气混合可以爆炸。

4 AlI₃ + 3 O₂ → 2 Al₂O₃ + 6 I₂

Aluminium iodide is any chemical compound containing only aluminium and iodine. Invariably, the name refers to a compound of the composition AlI₃, formed by the reaction of aluminium and iodine or the action of HI on Al metal. The hexahydrate is obtained from a reaction between metallic aluminum or aluminum hydroxide with hydrogen iodide or hydroiodic acid. Like the related chloride and bromide, AlI₃ is a strong Lewis acid and will absorb water from the atmosphere. It is employed as a reagent for the scission of certain kinds of C-O and N-O bonds. It cleaves aryl ethers and deoxygenates epoxides.