Cobalt(III) oxide
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| Names | |
|---|---|
| IUPAC name
cobalt(III) oxide, dicobalt trioxide
| |
| Other names
cobaltic oxide, cobalt sesquioxide
| |
| Identifiers | |
3D model (JSmol)
|
|
| ECHA InfoCard | 100.013.779 |
| EC Number | 215-156-7 |
PubChem CID
|
|
| RTECS number | GG2900000 |
| |
| |
| Properties | |
| Co2O3 | |
| Molar mass | 165.8646 g/mol |
| Appearance | red powder |
| Density | 5.18 g/cm3 [2] |
| Melting point | 895[3] °C (1,643 °F; 1,168 K) |
| negligible | |
| +4560.0·10−6 cm3/mol | |
| Structure | |
| Trigonal, hR30 | |
| R-3c, No. 167 | |
| Thermochemistry | |
Std enthalpy of
formation (ΔfH |
-577 kJ/mol |
| Hazards | |
| Main hazards | toxic |
| R-phrases (outdated) | R22 R40 R43 |
| S-phrases (outdated) | S36/37 |
| NFPA 704 | |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
| Infobox references | |
Cobalt (III) oxide is the inorganic compound with the formula of Co2O3. Although only two oxides of cobalt are well characterized, CoO and Co3O4,[4] 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.[5] Some formulations of the catalyst hopcalite contain "Co2O3".
See also[edit]
References[edit]
- ^ Sigma-Aldrich product page
- ^ Lide, David R., ed. (2006). CRC Handbook of Chemistry and Physics (87th ed.). Boca Raton, FL: CRC Press. ISBN 0-8493-0487-3.
- ^ http://www.chemicalbook.com/ChemicalProductProperty_US_CB4291419.aspx
- ^ Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. ISBN 0-08-037941-9.
- ^ Handbook of Preparative Inorganic Chemistry, 2nd Ed. Edited by G. Brauer, Academic Press, 1963, NY. p. 1675.