Used as a coupling component in azo dyes, particularly for producing red and orange shades in textile, leather, paper dyeing, and pigment printing on cellulosic fibers such as cotton and rayon. It is valued for its ability to form stable, insoluble azo pigments with good light and wash fastness. Commonly applied in histology as a stain for demonstrating enzyme activity, such as in alkaline phosphatase detection. Also utilized in the synthesis of disperse dyes for polyester and acetate fibers due to its affinity for hydrophobic materials. Additionally, employed in printing inks and paints requiring high color fastness.