Used as an analytical reagent for the detection and spectrophotometric determination of metal ions such as copper, zinc, and iron due to its ability to form colored complexes. It serves as a key intermediate in the synthesis of dyes and pigments, particularly in azo dye production. Also employed in the development of pharmaceuticals, where its derivatives exhibit anti-inflammatory and antimicrobial activities. Its structure supports use in heterocyclic chemistry research, especially in constructing biologically active molecules.