Used as a pH-sensitive azo dye in analytical chemistry for detection and quantification of metal ions, particularly iron and copper in environmental and biological samples. Its diazenyl and sulfonamide groups enable strong chromogenic response upon complexation, making it suitable for spectrophotometric analysis. Also investigated for use in dye-sensitized solar cells due to its light absorption properties in the visible range. Shows potential in biochemical staining applications because of its selective binding behavior under specific pH conditions.