5-Methoxy-2-methyl-4-nitroaniline is primarily used in the synthesis of azo dyes and pigments, playing a crucial role in producing vibrant, stable colors that are resistant to light and heat for textiles and inks. It serves as a key intermediate in the manufacture of pharmaceuticals and agrochemicals, such as insecticides and therapeutic agents, contributing to the development of active compounds. Due to its diverse functional groups—including methoxy, methyl, and nitro—it offers significant potential for structural modifications in organic synthesis. Additionally, it is utilized in research laboratories for chemical studies and organic synthesis.