Used in the synthesis of fluorescent dyes and optical brighteners for textiles and paper due to its sulfonic acid group enhancing water solubility and binding affinity. Employed in pharmaceutical intermediates for developing anti-inflammatory and antimicrobial agents. Acts as a modifier in electroplating baths to improve deposit uniformity and surface finish. Applied in the formulation of water-based inks and coatings where stability and dispersion are critical. Also utilized in research for developing sulfonated polymers with ion-exchange properties.