Used as a key intermediate in the synthesis of pharmaceuticals, particularly in the production of pyrazolone-based drugs with analgesic, anti-inflammatory, and antipyretic properties. It serves as a building block in the development of active pharmaceutical ingredients (APIs) such as metamizole and propyphenazone. Also employed in the preparation of dyes and pigments due to its ability to form colored complexes. Its structure allows for easy functionalization, making it valuable in medicinal chemistry for drug discovery and optimization. Additionally, it finds use in agrochemicals as a component in certain herbicides and plant growth regulators.