1,3-Propane sultone CAS No.: 1120-71-4 Molecular Formula: C3H6O3S Molecular Weight: 122.144 Appearance: white solid purity:99% Melting Point: 31 - 33 C Boiling Point: 180 C Flash Point: 113 C Stability: Stable, but moisture sensitive. Incompatible with strong oxidizing agents, strong acids, strong bases. Usage: 1,3-Propane sultone is used as chemical intermediate to introduce sulfopropyl group into molecules, & to confer water solubility & anionic character.