Used as a fluorescent probe in analytical chemistry for detecting and quantifying metal ions such as aluminum, zinc, and iron in environmental and biological samples. Its sulfonic acid group enhances water solubility, making it suitable for use in aqueous solutions. Also employed in the synthesis of dyes and optical brighteners due to its strong fluorescence under UV light. Additionally, it serves as an intermediate in the preparation of pharmaceuticals and chelating agents for metal decontamination processes.