Common Name: Sodium benzenesulfonate English Name: Sodium benzenesulfonate CAS Number: 515-42-4 EINECS: 208-198-2 Molecular Formula: C6H5NaO3S Molecular Weight: 180.157 Density: 1.124 g/mL Melting Point: 450 °C Appearance: White needle-like crystals. Solubility: Soluble in hot water, soluble in cold water, slightly soluble in hot ethanol. Uses: 1. Used as a dye intermediate, detergent additive, and in the foundry industry as an analytical reagent and organic synthesis intermediate. 2. Biochemical research.