Used as a key intermediate in the synthesis of water-soluble polymers, including hydrophilic polyesters for textiles with enhanced moisture absorption and breathability, suitable for sportswear and workwear. Enhances solubility and stability in dyes and fluorescent brightening agents for textiles and paper. Also utilized in the production of biodegradable plastics and resins to improve water solubility and material adhesion. Its sulfonate group serves as an adhesion promoter and dispersant in coatings, digital inks, and light/water-resistant printing inks. Applied in the paper industry to improve fiber quality and paper strength. Additionally, employed in metal-organic frameworks (MOFs) due to its coordination with metal ions, supporting gas storage and catalysis applications. Serves as a starting material for other organic compounds requiring a sulfonic group for solubility in polar solvents.