Phenylsulfur pentafluoride is primarily used in specialized chemical reactions, particularly in the field of organic synthesis. It serves as a fluorinating agent, introducing fluorine atoms into organic molecules, which can significantly alter their chemical and physical properties. This compound is valuable in the development of pharmaceuticals, agrochemicals, and advanced materials, where the introduction of fluorine can enhance stability, bioavailability, or reactivity. Additionally, it finds application in research laboratories for studying reaction mechanisms and exploring new synthetic pathways. Its unique reactivity makes it a useful tool in the synthesis of complex molecules, particularly in the creation of fluorinated aromatic compounds.