p-Styrene sulfonic acid sodium salt

• CAT Number: R070910
• CAS Number: 2695-37-6
• Molecular Formula: C8H7NaO3S
• Molecular Weight: 206.19
• Purity: ≥95%
• Synonyms: 4-Vinylbenzenesulfonic acid sodium salt
• Storage: RT
• IUPAC Name: sodium;4-ethenylbenzenesulfonate
• InChI: InChI=1S/C8H8O3S.Na/c1-2-7-3-5-8(6-4-7)12(9,10)11;/h2-6H,1H2,(H,9,10,11);/q;+1/p-1
• InChIKey: XFTALRAZSCGSKN-UHFFFAOYSA-M
• SMILES: C=CC1=CC=C(C=C1)S(=O)(=O)[O-].[Na+]

p-Styrene sulfonic acid sodium salt（Cat No.:R070910）is an aromatic sulfonated monomer with the molecular formula C8H7NaO3S. It consists of a styrene backbone bearing a sulfonic acid group at the para (4-) position, neutralized with a sodium ion. This white, hygroscopic powder is highly water-soluble and widely used in polymer chemistry, particularly in the production of ion-exchange resins, polyelectrolytes, and proton-conducting membranes. It imparts hydrophilicity, ionic conductivity, and thermal stability to copolymers. Due to its reactive vinyl group, it readily undergoes free-radical polymerization for applications in fuel cells, sensors, and water treatment.