Explore relationships

Sodium oxide

Names IUPAC nameSodium oxideOther names Disodium oxideNatrium oxide (historic)SodaSodium oxidosodiumIdentifiers CAS Number1313-59-33D model (JSmol)Interactive imageChemSpider66599ECHA InfoCard100.013.827EC Number215-208-9PubChemCID73971UNII3075U8R23DUN number1825 CompTox Dashboard(EPA)DTXSID0049781InChIInChI=1S/2Na.O/q2*+1;-2SMILES[O-2].[Na+].[Na+]Properties Chemical formulaNa2OMolar mass61.979 g·mol Appearance white solid Density2.49 g/cm Melting point1,132 °C (2,070 °F; 1,405 K) Boiling point1,950 °C (3,540 °F; 2,220 K) sublimates Sublimationconditionssublimates at 1275 °C Solubility in waterReacts to form NaOHSolubilityReacts with ethanolMagnetic susceptibility (χ)−19.8·10 cm/mol Structure Crystal structureAntifluorite (face centered cubic), cF12Space groupFm3m, No. 225 Coordination geometryTetrahedral (Na); cubic (O) Thermochemistry Heat capacity(C)72.95 J/(mol·K) Std molarentropy(S298)73 J/(mol·K) Std enthalpy offormation(ΔfH298)−416 kJ/mol Gibbs free energy(ΔfG)−377.1 kJ/mol Hazards Occupational safety and health (OHS/OSH): Main hazardscorrosive, reacts violently with water GHS labelling: PictogramsHazard statementsH314Precautionary statementsP260, P264, P280, P301+P330+P331, P303+P361+P353, P304+P340, P305+P351+P338, P310, P321, P363, P405, P501NFPA 704 (fire diamond) 301WFlash pointnonflammable Safety data sheet (SDS) ICSC 1653Related compounds Other anionsSodium sulfideSodium selenideSodium tellurideSodium polonideOther cationsLithium oxidePotassium oxideRubidium oxideCaesium oxideRelated sodiumoxidesSodium peroxideSodium superoxideSodium ozonideRelated compoundsSodium hydroxideExcept where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).Yverify ( ?)

Use + to expand a branch. Click a topic name to open its summary.