4-Methoxy-3-methylphenylamine is primarily used as an intermediate in the synthesis of various dyes and pigments. It plays a crucial role in the production of azo dyes, which are widely applied in the textile industry for coloring fabrics. Additionally, this compound is utilized in the manufacture of certain pharmaceuticals, where it serves as a building block for active pharmaceutical ingredients (APIs). Its application extends to the agrochemical sector, where it is involved in the development of herbicides and pesticides. The compound's chemical structure allows it to act as a precursor in organic synthesis, contributing to the creation of complex molecules in research and industrial processes.