Used primarily as a dye intermediate in the synthesis of azo dyes, which are widely applied in the textile, leather, and paper industries for coloring. It also serves in the production of pH indicators and biological stains for microscopy due to its strong chromophoric properties. Additionally, it has been employed in research settings for studying azo compound reactivity and photoisomerization behavior. Handle with care as it may be toxic and potentially carcinogenic with prolonged exposure.