CAS: 7664-38-2 EC No: 231-633-2 MDL No: MFCD00011340 RTECS: TB6300000 UN No: UN1805; Haz Class: 8; Packing Group: III Liquid Linear Formula: H₃PO₄ MW: 98.00 Melting Point: 19-21° Density (g/mL): 1.685 Refractive Index: 1.431