Used as a key intermediate in the synthesis of various pharmaceutical compounds, particularly in the development of kinase inhibitors and antiviral agents. Its hydrazine and amino functional groups allow for easy modification, making it valuable in constructing heterocyclic systems found in bioactive molecules. Commonly employed in medicinal chemistry for building pyrazole, triazole, and other nitrogen-containing rings that enhance drug potency and selectivity. Also utilized in the preparation of fluorescent probes and agrochemicals due to its reactivity and structural versatility.