m-Toluidine hydrochloride is primarily used as an intermediate in the synthesis of various dyes and pigments, particularly in the production of azo dyes. These dyes are widely applied in the textile, leather, and paper industries for coloring purposes. Additionally, it serves as a reagent in organic synthesis, aiding in the creation of pharmaceuticals and agrochemicals. Its role in the development of chemical compounds used in research and industrial processes highlights its importance in the chemical manufacturing sector.