Nitroterephthalic acid is primarily used in the synthesis of high-performance polymers and resins. It serves as a key intermediate in the production of polyimides, which are known for their thermal stability and mechanical strength, making them suitable for aerospace and electronics applications. Additionally, it is utilized in the manufacture of specialty coatings and adhesives that require durability and resistance to harsh environments. Its nitro group also makes it a valuable precursor in the development of dyes and pigments, particularly for applications demanding colorfastness and chemical resistance.