Used as a key intermediate in the synthesis of high-performance polymers, particularly in the production of aramid fibers which exhibit excellent thermal stability and mechanical strength. Commonly applied in manufacturing heat-resistant and flame-retardant materials for protective clothing, aerospace components, and industrial filters. Also serves as a building block in pharmaceuticals and agrochemicals due to its rigid aromatic structure and ability to form stable derivatives. Its amide groups enable hydrogen bonding, making it useful in supramolecular chemistry and crystal engineering for designing functional materials.