Silver(I,III) oxide
 Ag(I) Ag(III) O
| |
| Names | |
|---|---|
| IUPAC name
silver(I,III) Oxide
| |
| Other names
tetrasilver tetroxide, silver peroxide, argentic oxide, silver suboxide, divasil
| |
| Identifiers | |
| |
3D model (
JSmol ) |
|
ECHA InfoCard
|
100.013.726 |
| EC Number |
|
PubChem CID
|
|
| UNII | |
| |
| |
| Properties | |
| Ag4O4 Ag2O.Ag2O3 | |
| Molar mass | 123.87 g/mol |
| Appearance | grey-black powder diamagnetic
|
| Density | 7.48 g/cm3 |
| Melting point | >100 °C, decomposition |
| .0027 g/100 mL | |
| Solubility | soluble in alkalis |
| Hazards | |
| GHS labelling: | |
  
| |
| Danger | |
| H272, H315, H319, H335 | |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
| |
Silver(I,III) oxide or tetrasilver tetroxide is the
mixed-valence compound.[2] It is a dark brown solid that decomposes with evolution of O2 in water. It dissolves in concentrated nitric acid to give brown solutions containing the Ag2+ ion.[3]
Structure
Although its
X-ray diffraction studies show that the silver atoms adopt two different coordination environments, one having two collinear oxide neighbours and the other four coplanar oxide neighbours.[1] tetrasilver tetraoxide is therefore formulated as AgIAgIIIO2[4] or Ag2O·Ag2O3. It has previously been called silver peroxide, which is incorrect since it does not contain the peroxide
ion, O22−.
Uses
Tetrasilver tetroxide has been marketed under a trade name "Tetrasil." In 2010, the FDA issued a warning letter to an American company concerning the firm's marketing of Tetrasil and Genisil ointments of tetrasilver tetroxide for herpes and similar conditions.[5]
References
- ^ ISBN 0-19-855370-6
- ISBN 978-0-08-037941-8. p. 1181.
- ^ "FDA Warning Letter to Aidance Skincare and Topical Solutions, LLC | Quackwatch". 19 July 2010.