imported>Paul Derry |
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| ! {{chembox header}} | Cobalt(II) oxide <!-- replace if not identical with the article name -->
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| | align="center" colspan="2" bgcolor="#ffffff" | [[Image:Cobalt(II) oxide.jpg|200px|Cobalt(II,III) oxide]] <!-- replace if not identical with the pagename -->
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| ! {{chembox header}} | General
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| | [[IUPAC nomenclature|Systematic name]]
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| | Cobalt(II,III) Oxide
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| | Other names
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| | Cobalto-Cobaltic Oxide,<br />Tricobalt Tetraoxide,<br />tricobalt tetroxide
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| | [[Chemical formula|Molecular formula]]
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| | Co<sub>3</sub>O<sub>4</sub>
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| | [[Molar mass]]
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| | 240.80 g/mol
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| | Appearance
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| | A gray, green, red, or black powder
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| | [[CAS registry number|CAS number]]
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| | 1308-06-1
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| ! {{chembox header}} | Properties
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| | [[Density]] and [[Phase (matter)|phase]]
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| | 6.1 g/cm<sup>3</sup>
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| | [[Solubility]] in [[Water (molecule)|water]]
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| | practically insoluble in water
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| <!-- | Other solvents e.g. [[ethanol]], [[acetone]] -->
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| <!-- | solubility info on other solvents -->
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| | [[Melting point]]
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| | 895°C (1168 K) <!-- (mention any decomposition) -->
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| | [[Boiling point]]
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| | ?°C (? K)
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| ! {{chembox header}} | Hazards <!-- Summary only- MSDS entry provides more complete information -->
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| | [[Material safety data sheet|MSDS]]
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| |(Use CAS#) [http://www.fisher.co.uk/techzone/msds.htm Fisher Scientific]
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| | Main [[Worker safety and health|hazard]]s
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| | Respiratory tract inflammation <br/> possibly carcinogenic
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| | [[NFPA 704]]
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| | {{NFPA 704 | Health=2 }}
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| | [[Risk and Safety Statements|R/S statement]]
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| | [[List of R-phrases|R]]: 22 43 50-53 [[List of S-phrases|S]]: (2-)24-37-60-61
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| | [[RTECS]] number
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| | GG2500000
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| ! {{chembox header}} | Related compounds
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| | Other [[Ion|anion]]s <!-- please omit if not applicable -->
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| | [[Cobalt(II) carbonate]]<br />[[Cobalt(II) nitrate]], [[Cobalt(II) chloride]]
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| | Other [[Ion|cation]]s <!-- please omit if not applicable -->
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| | [[Iron(III) oxide]], [[Iron(II) oxide]]<br />[[Cobalt(II) oxide]]
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| | Related compounds
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| | [[Cobalt(III) oxide]]
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| | {{chembox header}} | <small>Except where noted otherwise, data are given for<br /> materials in their [[standard state|standard state (at 25°C, 100 kPa)]]<br />[[wikipedia:Chemical infobox|Infobox disclaimer and references]]</small>
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| == Summary == | | == Summary == |
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| == Health Issues == | | == Health Issues == |
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| RTECS recognizes Cobalt(II,III) oxide as a tumorigen in oral LD50 trials with lethal doses of 5g/kg per day in rats. This is characteristic with other oxides of cobalt | | RTECS recognizes Cobalt(II,III) oxide as a tumorigen in oral LD50 trials with lethal doses of greater than 5g/kg per day in rats. This is characteristic with other oxides of cobalt |
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| 1. http://digitalfire.com/gerstleyborate/material/m-01b121.htm | | 1. http://digitalfire.com/gerstleyborate/material/m-01b121.htm |
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| [[Category:Cobalt compounds]] | |
| [[Category:Chemistry Workgroup]]
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| [[Category:CZ Live]]
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Summary
Cobalt(II,III) oxide is the most prevalent of cobalt's various oxides. The oxide is typically found in ores alongside containing nickel, arsenic, sulfur, and manganese. These ores can be found in great quantities in Canada, Southern Africa, and Morocco among other locales.
This oxide has a gunmetal gray appearance and is typically distributed in a powdered form.
Derivative Compounds
Reactions of Cobalt(II,III) oxide can yield other oxides with similar characteristics:
When heated in the presence of excess oxygen:
- Co3O4(s) + O2(g) → 3 Co2O3(s)
The reaction yields Cobalt(III) Oxide.
Industrial Uses
Health Issues
RTECS recognizes Cobalt(II,III) oxide as a tumorigen in oral LD50 trials with lethal doses of greater than 5g/kg per day in rats. This is characteristic with other oxides of cobalt
