Used as an intermediate in the synthesis of azo dyes and pigments, providing vibrant color and stability to textile dyes and printing inks. Also serves as a coupling component in the production of lake pigments for cosmetics and food colorants due to its ability to form insoluble complexes. Additionally, it finds use in analytical chemistry as a reagent for detecting metal ions, particularly aluminum and beryllium, forming colored complexes that aid in spectrophotometric determination. Its hydroxyl and carboxylic acid groups make it suitable for coordination with metal ions in specialty chemical formulations.