Tetrabutylammonium perrhenate is a quaternary ammonium salt classified as an alkylammonium salt. This compound serves as a catalyst in organic synthesis, particularly in the production of olefins and alcohols. Additionally, it can bind with radioactive isotopes, making it usable as a radiopharmaceutical in nuclear medicine. Its distinct chemical properties render it an essential component in various industrial processes, including petrochemical refining and pharmaceuticals.