(2-Chloro-5-methylphenyl)hydrazine hydrochloride is primarily used as an intermediate in the synthesis of various organic compounds, particularly in the production of pharmaceuticals and agrochemicals. Its hydrazine moiety makes it a valuable building block for constructing heterocyclic structures, which are often found in active pharmaceutical ingredients. It is also employed in the development of dyes and pigments, where its chemical properties facilitate the formation of complex colorants. Additionally, this compound may be utilized in research settings for studying reaction mechanisms or developing novel chemical entities. Its applications are largely centered around its role as a versatile reagent in organic synthesis.