<Table> Potassium nitrite <Tr> <Td_colspan="2"> </Td> </Tr> <Tr> <Th_colspan="2"> Identifiers </Th> </Tr> <Tr> <Td> CAS Number </Td> <Td> <Ul> <Li> 7758 - 09 - 0 </Li> </Ul> </Td> </Tr> <Tr> <Td> 3D model (JSmol) </Td> <Td> <Ul> <Li> Interactive image </Li> </Ul> </Td> </Tr> <Tr> <Td> ChemSpider </Td> <Td> <Ul> <Li> 22857 </Li> </Ul> </Td> </Tr> <Tr> <Td> ECHA InfoCard </Td> <Td> 100.028. 939 </Td> </Tr> <Tr> <Td> EC Number </Td> <Td> 231 - 832 - 4 </Td> </Tr> <Tr> <Td> E number </Td> <Td> E249 (preservatives) </Td> </Tr> <Tr> <Td> PubChem CID </Td> <Td> <Ul> <Li> 516910 </Li> </Ul> </Td> </Tr> <Tr> <Td> RTECS number </Td> <Td> TT3750000 </Td> </Tr> <Tr> <Td> UNII </Td> <Td> <Ul> <Li> 794654G42L </Li> </Ul> </Td> </Tr> <Tr> <Td_colspan="2"> InChI (show) <Ul> <Li> InChI = 1S / K. HNO2 / c; 2 - 1 - 3 / h; (H, 2, 3) / q + 1; / p - 1 Key: BXNHTSHTPBPRFX - UHFFFAOYSA - M </Li> <Li> InChI = 1 / K. HNO2 / c; 2 - 1 - 3 / h; (H, 2, 3) / q + 1; / p - 1 Key: BXNHTSHTPBPRFX - REWHXWOFAI </Li> </Ul> </Td> </Tr> <Tr> <Td_colspan="2"> SMILES (show) <Ul> <Li> (K+). (O -) N =O </Li> </Ul> </Td> </Tr> <Tr> <Th_colspan="2"> Properties </Th> </Tr> <Tr> <Td> Chemical formula </Td> <Td> KNO </Td> </Tr> <Tr> <Td> Molar mass </Td> <Td> 85.10379 g / mol </Td> </Tr> <Tr> <Td> Appearance </Td> <Td> white or slight yellow solid deliquescent </Td> </Tr> <Tr> <Td> Density </Td> <Td> 1.914986 g / cm </Td> </Tr> <Tr> <Td> Melting point </Td> <Td> 440.02 ° C (824.04 ° F; 713.17 K) (decomposes) </Td> </Tr> <Tr> <Td> Boiling point </Td> <Td> 537 ° C (999 ° F; 810 K) (explodes) </Td> </Tr> <Tr> <Td> Solubility in water </Td> <Td> 281 g / 100 mL (0 ° C) 312 g / 100 mL (25 ° C) 413 g / 100 mL (100 ° C) </Td> </Tr> <Tr> <Td> Solubility </Td> <Td> soluble in alcohol, ammonia </Td> </Tr> <Tr> <Td> Magnetic susceptibility (χ) </Td> <Td> − 23.3 10 cm / mol </Td> </Tr> <Tr> <Th_colspan="2"> Thermochemistry </Th> </Tr> <Tr> <Td> Specific heat capacity (C) </Td> <Td> 107.4 J / mol K </Td> </Tr> <Tr> <Td> Std enthalpy of formation (Δ H) </Td> <Td> - 369.8 kJ / mol </Td> </Tr> <Tr> <Th_colspan="2"> Hazards </Th> </Tr> <Tr> <Td> Safety data sheet </Td> <Td> External MSDS </Td> </Tr> <Tr> <Td> EU classification (DSD) (outdated) </Td> <Td> Oxidant (O) Harmful (Xn) Dangerous for the environment (N) </Td> </Tr> <Tr> <Td> R - phrases (outdated) </Td> <Td> R8 R25 R50 </Td> </Tr> <Tr> <Td> S - phrases (outdated) </Td> <Td> S45 S61 </Td> </Tr> <Tr> <Td> NFPA 704 </Td> <Td> 0 OX </Td> </Tr> <Tr> <Td> Flash point </Td> <Td> Non-flammable </Td> </Tr> <Tr> <Td_colspan="2"> Lethal dose or concentration (LD, LC): </Td> </Tr> <Tr> <Td> LD (median dose) </Td> <Td> 235 mg / kg </Td> </Tr> <Tr> <Th_colspan="2"> Related compounds </Th> </Tr> <Tr> <Td> Other anions </Td> <Td> Potassium nitrate </Td> </Tr> <Tr> <Td> Other cations </Td> <Td> Sodium nitrite </Td> </Tr> <Tr> <Td_colspan="2"> Except where otherwise noted, data are given for materials in their standard state (at 25 ° C (77 ° F), 100 kPa). </Td> </Tr> <Tr> <Td_colspan="2"> Y verify (what is?) </Td> </Tr> <Tr> <Td_colspan="2"> Infobox references </Td> </Tr> <Tr> <Td> </Td> <Td> </Td> </Tr> </Table> <Tr> <Th_colspan="2"> Identifiers </Th> </Tr>

The oxidation number of nitrogen in potassium nitrite (kno2) is