Used as an intermediate in the synthesis of dyes and pigments, particularly in the production of azo dyes for textiles and printing inks. Plays a role in the development of pharmaceuticals, especially in the construction of heterocyclic compounds with potential anti-inflammatory and analgesic properties. Also employed in analytical chemistry as a reagent for the detection of certain metal ions due to its ability to form colored complexes. Its reactivity makes it valuable in the preparation of agrochemicals and functional materials.