Used as an intermediate in the synthesis of dyes and pigments, particularly in the production of azo dyes where its nitro and carboxylic acid groups facilitate coupling reactions. Also employed in the development of photochromic materials due to its light-sensitive nitro group. Its dimethylamino functionality makes it useful in the design of organic semiconductors and fluorescent probes for biochemical imaging. Additionally, it serves as a building block in pharmaceuticals for modifying drug solubility and binding characteristics.