it is used as an iodine-based reagent for oxidation reactions in organic and analytical chemistry. It can be used where a controlled relatively mild iodine-mediated oxidation is required.

The purpose of this reagent is to provide a defined concentration of molecular iodine in a predominantly THF-based aqueous medium. Pyridine is included in a small amount to modify the reaction environment while water provides the aqueous component needed

This reagent contains 0.02 M molecular iodine dissolved in a solvent mixture consisting of 90.6% THF 0.4% pyridine and 9% water by volume. THF acts as the primary solvent water provides the aqueous phase and pyridine functions as a basic additive that can interact with iodine and influence the reaction conditions.