hydriodic acid

…give alkyl bromides or by hydroiodic acid (HI) to give alkyl iodides.

…hydrogen iodide (HI), known as hydroiodic acid, is a strong acid that is used to prepare iodides by reaction with metals or their oxides, hydroxides, and carbonates. Iodine exhibits a +5 oxidation state in the moderately strong iodic acid (HIO₃), which can be readily dehydrated to yield the white solid…