Sodium oxide

Sodium oxide
Names
	IUPAC name Sodium oxide
	Other names Disodium oxide; Natrium oxide (historic); Soda; Sodium oxidosodium;
Identifiers
CAS Number	1313-59-3 ;
3D model (JSmol)	Interactive image;
ECHA InfoCard	100.013.827
EC Number	215-208-9;
PubChem CID	73971;
UNII	3075U8R23D ;
UN number	1825
CompTox Dashboard (EPA)	DTXSID0049781 ;
	InChI InChI=1S/2Na.O/q2*+1;-2;
	SMILES [O-2].[Na+].[Na+];
Properties
Chemical formula	Na2O
Molar mass	61.979 g·mol−1
Appearance	white solid
Density	2.27 g/cm3
Melting point	1,132 °C (2,070 °F; 1,405 K)
Boiling point	1,950 °C (3,540 °F; 2,220 K) sublimates
Sublimation; conditions	sublimates at 1275 °C
Solubility in water	Reacts to form NaOH
Solubility	Reacts with ethanol
Magnetic susceptibility (χ)	−19.8·10−6 cm3/mol
Structure
Crystal structure	Antifluorite (face centered cubic), cF12
Space group	Fm3m, No. 225
Coordination geometry	Tetrahedral (Na+); cubic (O2−)
Thermochemistry
Heat capacity (C)	72.95 J/(mol·K)
Std molar; entropy (S⦵298)	73 J/(mol·K)
Std enthalpy of; formation (ΔfH⦵298)	−416 kJ/mol
Gibbs free energy (ΔfG⦵)	−377.1 kJ/mol
Hazards
	Occupational safety and health (OHS/OSH):
Main hazards	corrosive, reacts violently with water
	GHS labelling:
Pictograms
Hazard statements	H314
Precautionary statements	P260, P264, P280, P301+P330+P331, P303+P361+P353, P304+P340, P305+P351+P338, P310, P321, P363, P405, P501
NFPA 704 (fire diamond)	3 0 1 W
Flash point	nonflammable
Safety data sheet (SDS)	ICSC 1653
Related compounds
Other anions	Sodium sulfide; Sodium selenide; Sodium telluride; Sodium polonide;
Other cations	Lithium oxide; Potassium oxide; Rubidium oxide; Caesium oxide;
Related sodium oxides	Sodium peroxide; Sodium superoxide; Sodium ozonide;
Related compounds	Sodium hydroxide
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

Sodium oxide is a chemical compound with the formula Na₂O. It is used in ceramics and glasses. It is a white solid but the compound is rarely encountered. Instead "sodium oxide" is used to describe components of various materials such as glasses and fertilizers which contain oxides that include sodium and other elements.

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