N-Methyl-3-nitroaniline is primarily used as an intermediate in the synthesis of various dyes and pigments, particularly in the production of azo dyes, which are widely employed in the textile, paper, and leather industries. Its nitro and amino functional groups make it a valuable building block for creating complex dye molecules that exhibit vibrant colors and good stability. Additionally, it finds application in organic synthesis for the preparation of pharmaceuticals and agrochemicals, where it serves as a precursor for compounds with biological activity. In research, it is utilized in the development of new chemical reactions and processes due to its reactive nature and ability to undergo various transformations.