Used as an intermediate in the synthesis of high-performance dyes and pigments, particularly in azo dye production where its amino and hydroxyl groups allow for selective functionalization. Its rigid aromatic structure with multiple polar groups makes it suitable for developing lightfast and thermally stable colorants. Also explored in polymer chemistry to introduce hydrogen bonding sites, enhancing mechanical strength and thermal stability in polyamides and polyimides. Additionally, its chelating ability supports use in metal ion sensors and catalysts, especially with transition metals in aqueous systems.