Used primarily as a reagent in organic synthesis, especially for converting alcohols into alkyl iodides. It is effective in transforming primary and secondary alcohols into the corresponding iodides, which are useful intermediates in pharmaceutical and agrochemical manufacturing. The reagent is often generated in situ due to its instability and moisture sensitivity. It also participates in the preparation of other iodine-containing compounds and can act as a source of iodine in various reduction and substitution reactions. Its use is limited in large-scale industrial processes due to handling difficulties and the availability of more stable alternatives.