Used as a reagent in organic synthesis, particularly in cross-coupling reactions such as Suzuki and Heck reactions, where it serves as an aryl iodide component. Its electron-rich nature due to the five methyl groups enhances reactivity in metal-catalyzed transformations. Also employed in the preparation of functionalized aromatic compounds for materials science and pharmaceutical intermediates. Shows utility in radiolabeling studies when isotopically labeled iodine is used, allowing for tracer applications in metabolic and imaging research.