Formula: H3PO4 CAS No.: 7664-38-2 UN No.: UN3453 pH: Solubility: 750 - 850 g/l (20°C) Melting Point: 42°C Molar Mass: 97.99 g/mol Boiling Point: 213°C (1013 hPa) Vapor Pressure: 2 hPa (20°C) Density: 1.87 g/cm3 (25°C) Hill Formula: H3O4P