(4-Methoxybenzyl)hydrazine dihydrochloride is primarily used in organic synthesis as a building block for the preparation of various chemical compounds. It serves as a key intermediate in the synthesis of pharmaceuticals, particularly in the development of drugs targeting the central nervous system. The compound is also employed in the production of agrochemicals, where it contributes to the creation of pesticides and herbicides. Additionally, it finds application in the field of material science, aiding in the development of specialized polymers and coatings. Its hydrazine moiety makes it a valuable reagent in the formation of hydrazone derivatives, which are useful in biochemical assays and as probes in chemical research.