Used as an intermediate in the synthesis of azo dyes and pigments, particularly for high-performance colorants in textiles and inks. Plays a role in the preparation of pharmaceuticals due to its aromatic amine functionality, enabling the formation of biologically active compounds. Also employed in research for developing novel polymers and coordination complexes with metal ions, useful in catalysis and material science. Its hydrochloride form enhances solubility and stability in aqueous reaction systems.