Used as an intermediate in the synthesis of dyes and pigments, particularly for azo dyes that provide bright shades and good lightfastness. It plays a role in the production of textile dyes, leather dyes, and ink formulations. Also employed in the preparation of fluorescent whitening agents for paper and plastics. In addition, it serves as a building block in organic synthesis for pharmaceuticals and agrochemicals where naphthalene derivatives are required. Its amino and carboxylic functional groups allow for easy modification and coupling reactions, making it valuable in research and industrial applications.