CAS: 7632-00-0 EC No: 231-555-9 MDL No: MFCD00011118 RTECS: RA1225000 UN No: UN1500; Haz Class: 5.1 (6.1); Packing Group: III Solid Linear Formula: NaNO₂ MW: 69.00 Melting Point: 271° Boiling Point: 320° Density (g/mL): 2.168