(2-Methoxyphenyl)hydrazine hydrochloride is widely used in organic synthesis as a key intermediate for the preparation of various heterocyclic compounds. It plays a significant role in the synthesis of indoles, which are important structures in many pharmaceuticals and agrochemicals. This compound is also utilized in the development of dyes and pigments due to its ability to form stable diazonium salts. Additionally, it finds application in research laboratories for studying hydrazine derivatives and their reactivity in chemical reactions. Its use extends to the production of biologically active molecules, particularly in medicinal chemistry, where it serves as a building block for drug discovery and development.