Cobalt(III) oxide

Cobalt(III) oxide
Names

IUPAC name cobalt(III) oxide, dicobalt trioxide
Other names cobaltic oxide, cobalt sesquioxide
Identifiers
CAS Number	1308-04-9^Y
3D model (Jmol)	Interactive image
ECHA InfoCard	100.013.779
EC Number	215-156-7
PubChem CID	4110762
RTECS number	GG2900000
InChI InChI=1S/2Co.3O Key: UPWOEMHINGJHOB-UHFFFAOYSA-N
SMILES O=[Co]O[Co]=O
Properties
Chemical formula	Co₂O₃
Molar mass	165.8646 g/mol
Appearance	red powder
Density	5.18 g/cm³
Melting point	895 °C (1,643 °F; 1,168 K)
Solubility in water	negligible
Magnetic susceptibility (χ)	+4560.0·10⁻⁶ cm³/mol
Structure
Crystal structure	Trigonal, hR30
Space group	R-3c, No. 167
Thermochemistry
Std enthalpy of formation (Δ_fH^o₂₉₈)	-577 kJ/mol
Hazards
R-phrases (outdated)	R22 R40 R43
S-phrases (outdated)	S36/37
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
N (what is ^YN ?)
Infobox references

Cobalt (III) oxide is the inorganic compound with the formula of Co₂O₃, most commonly used in bleach. Although only two oxides of cobalt are well characterized, CoO and Co₃O₄, procedures claiming to give Co₂O₃ have been described. Thus treatment of Co(II) salts such as cobalt(II) nitrate with an aqueous solution of sodium hypochlorite (also known as bleach) gives a black solid. Some formulations of the catalyst hopcalite contain "Co₂O₃".

...
Wikipedia