3,5-Diphenylpyridine is primarily utilized in the field of organic synthesis as a key intermediate for the preparation of various complex molecules. Its structure, featuring both phenyl and pyridine rings, makes it a versatile building block in the development of pharmaceuticals, particularly in the synthesis of compounds with potential therapeutic properties. Additionally, it is employed in the creation of organic materials, such as ligands for metal coordination complexes, which are used in catalysis and material science. Its aromatic properties also make it suitable for use in the design of fluorescent dyes and optoelectronic materials, contributing to advancements in imaging technologies and electronic devices.