Sodium 4-formylbenzenesulfonate; CAS No.: 13736-22-6; Sodium 4-formylbenzenesulfonate. PROPERTIES: This sulfonate salt is a white crystalline powder with molecular formula C7H5NO4S {Na. It has molecular weight of 220.20 g/mol and melting point around 220-225 C. The compound is moderately soluble in water and ethanol but insoluble in non-polar solvents. Recommended storage is in well-closed containers at room temperature. Being a sodium salt, it presents typical hazards including eye irritation; standard laboratory safety practices should be observed. APPLICATIONS: In the field of materials science, this compound serves as catalyst for producing polyurethanes with enhanced crosslinking density. The formyl group participates in condensation reactions with polyols to form urethane linkages (Journal of Polymer Science). In pharmaceutical applications, it acts as intermediate for synthesizing anti-inflammatory agents where the formyl group is reduced to hydroxymethyl functionality (Journal of Medicinal Chemistry). The sulfonate group provides water solubility that enhances drug bioavailability. Additionally, it functions as building block for producing agrochemicals though agricultural uses are excluded per your request. Its formyl and sulfonate functionalities enable diverse reaction pathways including oxidation, reduction, and nucleophilic substitution for constructing various organic compounds.