Formula: H2NSO3H CAS No.: 5329-14-6 UN No.: UN2967 pH: 1.2 (10 g/l, H2O) Solubility: 213 g/l (20°C) Melting Point: 205°C (decomposition) Molar Mass: 97.08 g/mol Bulk Density: 600 kg/m3 Density: 2.13 g/cm3 (20°C) Hill Formula: H3NO3S