Used in the synthesis of dyes and fluorescent compounds due to its naphthalene backbone and nitro group, which enhance light absorption and emission properties. Commonly employed as an intermediate in organic reactions, especially in the preparation of naphthyl-based dyes and pigments. Also finds use in research for developing sensors or probes, where the nitro group acts as an electron acceptor in photochemical systems. Its carboxylic acid functionality allows for easy derivatization, making it useful in building more complex molecules for pharmaceutical or agrochemical research.