CAS: 7757-79-1 EC No: 231-818-8 MDL No: MFCD00011409 RTECS: TT3700000 UN No: UN1486; Haz Class: 5.1; Packing Group: III Crystalline Molecular Formula: KNO₃ MW: 101.11 Melting Point: 334° Boiling Point: 400° (decomposes) Density (g/mL): 2.109