Used as a dye intermediate in the textile industry for producing azo dyes, particularly for coloring synthetic fibers. It imparts bright yellow to red shades and is valued for its color fastness. Also employed in the manufacture of indicators for pH testing due to its chromogenic properties. Limited use in research for studying azo compound degradation and photoisomerization behavior under UV light. Not used in food or pharmaceutical applications due to potential toxicity of aromatic amines upon breakdown.