Used primarily as a key intermediate in the synthesis of pharmaceuticals, particularly in the development of antihypertensive and antiviral agents. It serves as a building block in the preparation of heterocyclic compounds such as pyrazoles and triazoles, which are common scaffolds in drug design. Its hydrazine functionality allows for condensation reactions with carbonyl compounds, enabling the formation of hydrazones—useful in medicinal chemistry for their biological activity and role in click chemistry. Also employed in the production of agrochemicals and functional materials due to its reactivity and stability in multi-step synthetic routes.