Used in specialized catalytic reactions, particularly in organic synthesis where rhenium-based compounds act as oxidation catalysts. It serves as a precursor for preparing other rhenium complexes used in industrial and laboratory settings. Also explored in electrochemical applications due to its redox-active metal center. Its iodide ligands can be substituted to form new complexes with tailored reactivity. Limited but valuable use in materials science for depositing rhenium-containing thin films under controlled conditions.