4-(3-Methoxyphenyl)aniline is primarily used as an intermediate in the synthesis of various organic compounds. It plays a significant role in the production of dyes and pigments, particularly in creating colorants for textiles, plastics, and inks. The compound's structure allows it to form stable and vibrant colors, making it valuable in industries requiring high-quality coloration. Additionally, it is utilized in the development of pharmaceuticals, where it serves as a building block for active ingredients in certain drugs. Its methoxy and aniline groups contribute to its reactivity, enabling its use in coupling reactions and other chemical transformations in research and industrial applications.