Product NameSodium P-Toluene Sulfinate Tetrahydrate (SPTS) Other NameSodium P-Toluenesulfinate Tetrahydrate; P-Toluenesulfinic Acid Sodium Salt Tetrahydrate; P-Toluene Sulfinic Acid Sodium·Tetrahydrate CAS No868858-48-4 Molecular FormulaC7H7O2SNa·4H2O Product UsageIt can be used as intermediate of pharmaceutical and dispersal dyes, and also can be used as curing agent of grouting material. Check-PointUnitSpecifications Appearance--White Crystalline Powder Purity% min98 Loss On Drying% max25-35 PH--8.5-9.0 Insoluble Matter In Water H2O 20% Soln--clear & colorless Heavy Metalppm max20 Sulfate% max0.2 Chloride% max0.5 Ironppm max10