(3-Bromobenzyl)hydrazine dihydrochloride is primarily utilized in organic synthesis as a key intermediate for the preparation of various pharmacologically active compounds. It is often employed in the development of hydrazone derivatives, which are significant in the synthesis of drugs targeting diseases such as cancer, tuberculosis, and bacterial infections. Additionally, this compound is used in the creation of heterocyclic compounds, which are essential in medicinal chemistry for designing molecules with potential therapeutic effects. Its role in coupling reactions also makes it valuable in the production of complex organic molecules for research and industrial applications.