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4-(phenylsulfonyl)benzoic acid; CAS No.: 5361-54-6; 4-(phenylsulfonyl)benzoic acid. PROPERTIES: 4-(phenylsulfonyl)benzoic acid is a white crystalline powder with a molecular formula of C13H10O4S. It has a molecular weight of 262.28 g/mol and a melting point of approximately 198-202 C. The compound exhibits moderate solubility in water and is more soluble in polar organic solvents like methanol and ethanol. It is sensitive to basic conditions and should be stored in a cool, dry place at temperatures below 30 C in a tightly sealed container. Safety precautions include avoiding skin contact and using eye protection. It is classified as a category 3 skin irritant according to GHS guidelines. APPLICATIONS: 4-(phenylsulfonyl)benzoic acid serves as a versatile intermediate in the synthesis of various anticoagulant agents, particularly those targeting factor Xa inhibition. Its sulfonamide group provides essential hydrogen bonding interactions with target enzymes. In the field of materials science, this compound is used in the preparation of polymeric materials with enhanced flame retardancy properties. It also functions as a building block for the synthesis of fluorescent probes for detecting specific enzymes in biological systems, as reported in Analytical Chemistry. Additionally, the compound is employed in the development of novel electrochemical sensors for environmental monitoring applications, where its redox-active sulfonamide group participates in electron transfer processes. Its unique electronic properties make it valuable in the synthesis of metal-organic frameworks (MOFs) for gas storage applications, as described in the journal Chemical Materials, where its carboxylic acid group coordinates with metal centers to form porous structures.