Silver oxide

Silver oxide
	; Unit cell
	; Crystal packing
Names
	IUPAC name Silver(I) oxide
	Other names Silver rust, Argentous oxide, Silver monoxide
Identifiers
CAS Number	20667-12-3 ;
3D model (JSmol)	Interactive image;
ChemSpider	7970393 ;
ECHA InfoCard	100.039.946
EC Number	243-957-1;
MeSH	silver+oxide
PubChem CID	9794626;
RTECS number	VW4900000;
UNII	897WUN6G6T ;
CompTox Dashboard (EPA)	DTXSID40893897 ;
	InChI InChI=1S/2Ag.O/q2+1;-2 Key: NDVLTYZPCACLMA-UHFFFAOYSA-N ; InChI=1S/2Ag.O/q2+1;-2 Key: NDVLTYZPCACLMA-UHFFFAOYSA-N;
	SMILES [O-2].[Ag+].[Ag+];
Properties
Chemical formula	Ag2O
Molar mass	231.735 g·mol−1
Appearance	Black/ brown cubic crystals
Odor	Odorless
Density	7.14 g/cm3
Melting point	300 °C (572 °F; 573 K) decomposes from ≥200 °C
Solubility in water	0.013 g/L (20 °C); 0.025 g/L (25 °C); 0.053 g/L (80 °C)
Solubility product (Ksp) of AgOH	1.52·10−8 (20 °C)
Solubility	Soluble in acid, alkali; Insoluble in ethanol
Magnetic susceptibility (χ)	−134.0·10−6 cm3/mol
Structure
Crystal structure	Cubic
Space group	Pn3m, 224
Thermochemistry
Heat capacity (C)	65.9 J/mol·K
Std molar; entropy (S⦵298)	122 J/mol·K
Std enthalpy of; formation (ΔfH⦵298)	−31 kJ/mol
Gibbs free energy (ΔfG⦵)	−11.3 kJ/mol
Hazards
	GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H272, H315, H319, H335
Precautionary statements	P220, P261, P305+P351+P338
NFPA 704 (fire diamond)	2 0 1
	Lethal dose or concentration (LD, LC):
LD50 (median dose)	2.82 g/kg (rats, oral)
Related compounds
Related compounds	Silver(I,III) oxide
	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

Silver oxide is the chemical compound with the formula Ag₂O. It is a fine black or dark brown powder that is used to prepare other silver compounds.

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