4-Phenoxyphthalonitrile（Cat No.:R056438）is an aromatic organic compound with the molecular formula C14H8N2O, characterized by a phenoxy group attached to a phthalonitrile core. It serves as a key intermediate in the synthesis of phthalocyanines, a class of macrocyclic compounds widely used in dyes, pigments, semiconductors, and photodynamic therapy. The presence of electron-withdrawing cyano groups and the phenoxy substituent enhances its reactivity in cyclotetramerization reactions. Its structural properties make it valuable in materials science, especially for producing advanced functional materials with optical, electronic, and photochemical applications in both industrial and research settings.