Used as an intermediate in the synthesis of dyes and pigments, particularly in the production of pyrazolone dyes which are valued for their bright shades and good lightfastness. It plays a key role in the development of azo dyes and indicators used in textiles, printing inks, and colorants. Also serves as a building block in pharmaceuticals, contributing to the formation of anti-inflammatory and analgesic agents. Its derivatives show biological activity and are explored in medicinal chemistry for drug development. Additionally, it finds use in photography as a component in color developing agents.