Used primarily as an intermediate in the synthesis of pharmaceuticals and agrochemicals. It serves as a building block in the preparation of heterocyclic compounds, particularly in the formation of indoles and other nitrogen-containing rings through cyclization reactions. Its hydrazine functionality allows it to participate in diazotization and coupling reactions, useful in dye and pigment manufacturing. Also employed in research settings for the development of novel bioactive molecules, including potential antitumor and antimicrobial agents. The hydrochloride salt form enhances stability and solubility, facilitating handling and reaction in aqueous or polar organic media.