CAS No.: 920-66-1 pH: 3 - 4 (H2O) Aqueous solution Solubility: (20°C) soluble Melting Point: -3°C Molar Mass: 168.03 g/mol Boiling Point: 58°C (1013 hPa) Vapor Pressure: 269 hPa (30°C) Flash Point: >100°C Refractive Index: 1.2752 (25°C, 589 nm) Density: 1.62 g/cm3 (20°C)