Used as a key intermediate in the synthesis of fluorescent dyes and optical brighteners due to its ability to enhance light absorption and emission properties. Its structure supports conjugation systems important for color development in dyes. Also employed in the preparation of metal-organic frameworks (MOFs) where it acts as a linker ligand, contributing to framework stability and porosity. Additionally, it finds use in biochemical applications as a derivatizing agent for amines and proteins, improving detection in analytical methods like HPLC and mass spectrometry.