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Silver oxide information


This article is about silver(I) oxide. For the mixed-valence oxide, see Silver(I,III) oxide.
Silver oxide
Silver(I) oxide structure in unit cell
Unit cell

Crystal packing
Silver(I) oxide powder
Names
IUPAC name
Silver(I) oxide
Other names
Silver rust, Argentous oxide, Silver monoxide
Identifiers
CAS Number
  • 20667-12-3 checkY
3D model (JSmol)
  • Interactive image
ChemSpider
  • 7970393 ☒N
ECHA InfoCard 100.039.946 Edit this at Wikidata
EC Number
  • 243-957-1
MeSH silver+oxide
PubChem CID
  • 9794626
RTECS number
  • VW4900000
UNII
  • 897WUN6G6T checkY
CompTox Dashboard (EPA)
  • DTXSID40893897 Edit this at Wikidata
InChI
  • InChI=1S/2Ag.O/q2*+1;-2 ☒N
    Key: NDVLTYZPCACLMA-UHFFFAOYSA-N ☒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[1]
Density 7.14 g/cm3
Melting point 300 °C (572 °F; 573 K) decomposes from ≥200 °C[3][4]
Solubility in water
 0.013 g/L (20 °C)
0.025 g/L (25 °C)[2]
0.053 g/L (80 °C)[3]
Solubility product (Ksp) of AgOH
 1.52·10−8 (20 °C)
Solubility Soluble in acid, alkali
Insoluble in ethanol[2]
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[2]
Std molar
entropy (S⦵298)
 122 J/mol·K[5]
Std enthalpy of
formation (ΔfH⦵298)
 −31 kJ/mol[5]
Gibbs free energy (ΔfG⦵)
 −11.3 kJ/mol[4]
Hazards
GHS labelling:
Pictograms
 GHS03: OxidizingGHS07: Exclamation mark[6]
Signal word
 Danger
Hazard statements
 H272, H315, H319, H335[6]
Precautionary statements
 P220, P261, P305+P351+P338[6]
NFPA 704 (fire diamond)
[1]
NFPA 704 four-colored diamondHealth 2: Intense or continued but not chronic exposure could cause temporary incapacitation or possible residual injury. E.g. chloroformFlammability 0: Will not burn. E.g. waterInstability 1: Normally stable, but can become unstable at elevated temperatures and pressures. E.g. calciumSpecial hazards (white): no code
2
0
1
Lethal dose or concentration (LD, LC):
LD50 (median dose)
 2.82 g/kg (rats, oral)[1]
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).
☒N verify (what is checkY☒N ?)
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.

  1. ^ a b c "Silver Oxide MSDS". SaltLakeMetals.com. Salt Lake Metals. Retrieved 2014-06-08.
  2. ^ a b c Lide, David R. (1998). Handbook of Chemistry and Physics (81 ed.). Boca Raton, FL: CRC Press. pp. 4–83. ISBN 0-8493-0594-2.
  3. ^ a b Perry, Dale L. (1995). Handbook of Inorganic Compounds (illustrated ed.). CRC Press. p. 354. ISBN 0849386713.
  4. ^ a b "Silver oxide".
  5. ^ a b Zumdahl, Steven S. (2009). Chemical Principles 6th Ed. Houghton Mifflin Company. p. A23. ISBN 978-0-618-94690-7.
  6. ^ a b c Sigma-Aldrich Co., Silver(I) oxide. Retrieved on 2014-06-07.

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