(3,4-dimethylphenyl)hydrazine is primarily used in organic synthesis as a building block for the preparation of various heterocyclic compounds. It serves as a key intermediate in the production of pharmaceuticals, particularly in the synthesis of drugs that target the central nervous system. Additionally, it is employed in the development of agrochemicals, where it contributes to the creation of pesticides and herbicides. Its hydrazine moiety makes it a valuable reagent in the formation of hydrazones, which are useful in analytical chemistry for the detection and quantification of carbonyl compounds. The compound is also explored in material science for the synthesis of dyes and pigments, owing to its ability to form stable aromatic structures.