Back كلوريد الكوبالت الثنائي Arabic کولورید کوبالت (II) AZB Clorur de cobalt(II) Catalan Chlorid kobaltnatý Czech Cobalt(II)-chlorid German Διχλωριούχο κοβάλτιο Greek Kobalta (II) klorido EO Cloruro de cobalto(II) Spanish کبالت(II) کلرید FA Kobolttikloridi Finnish
_chloride&sq=crain_ford&lang=en&file=File:Cobaltous_chloride.jpg) Hexahydrate
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_chloride&sq=crain_ford&lang=en&file=File:Cobaltous_chloride_anhydrous.jpg) Anhydrous
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| Names | |
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| IUPAC name
Cobalt(II) chloride
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| Other names | |
| Identifiers | |
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3D model (JSmol)
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| ChEBI | |
| ChemSpider | |
| ECHA InfoCard | 100.028.718 |
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PubChem CID
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| UNII |
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| UN number | 3288 |
CompTox Dashboard (EPA)
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| Properties | |
| CoCl2 | |
| Molar mass | 129.839 g/mol (anhydrous) 165.87 g/mol (dihydrate) 237.93 g/mol (hexahydrate) |
| Appearance | blue crystals (anhydrous) violet-blue (dihydrate) rose red crystals (hexahydrate) |
| Density | 3.356 g/cm3 (anhydrous) 2.477 g/cm3 (dihydrate) 1.924 g/cm3 (hexahydrate) |
| Melting point | 726 °C (1,339 °F; 999 K) ±2 (anhydrous)[2] 140 °C (monohydrate) 100 °C (dihydrate) 86 °C (hexahydrate) |
| Boiling point | 1,049 °C (1,920 °F; 1,322 K) |
| 43.6 g/100 mL (0 °C) 45 g/100 mL (7 °C) 52.9 g/100 mL (20 °C) 105 g/100 mL (96 °C) | |
| Solubility | 38.5 g/100 mL (methanol) 8.6 g/100 mL (acetone) soluble in ethanol, pyridine, glycerol |
| +12,660·10−6 cm3/mol | |
| Structure | |
| CdCl2 structure | |
| hexagonal (anhydrous) monoclinic (dihydrate) Octahedral (hexahydrate) | |
| Hazards | |
| GHS labelling: | |
_chloride&sq=crain_ford&lang=en&file=File:GHS-pictogram-skull.svg) _chloride&sq=crain_ford&lang=en&file=File:GHS-pictogram-silhouette.svg) _chloride&sq=crain_ford&lang=en&file=File:GHS-pictogram-pollu.svg)
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| NFPA 704 (fire diamond) | |
| Flash point | Non-flammable |
| Lethal dose or concentration (LD, LC): | |
LD50 (median dose)
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80 mg/kg (rat, oral) |
| Safety data sheet (SDS) | ICSC 0783 |
| Related compounds | |
Other anions
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Cobalt(II) fluoride Cobalt(II) bromide Cobalt(II) iodide |
Other cations
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Rhodium(III) chloride Iridium(III) chloride |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Cobalt(II) chloride is an inorganic compound, a salt of cobalt and chlorine, with the formula CoCl
2. The compound forms several hydrates CoCl
2·nH
2O, for n = 1, 2, 6, and 9. Claims of the formation of tri- and tetrahydrates have not been confirmed.[4] The anhydrous form is a blue crystalline solid; the dihydrate is purple and the hexahydrate is pink. Commercial samples are usually the hexahydrate, which is one of the most commonly used cobalt salts in the lab.[5]
- ^ "Cobalt muriate, CAS Number: 7646-79-9". www.chemindustry.com. Archived from the original on 28 May 2019. Retrieved 19 April 2018.
- ^ Cite error: The named reference
wojakwas invoked but never defined (see the help page). - ^ Santa Cruz Biotechnology: Cobalt(II) chloride
- ^ M. T. Saugier, M. Noailly, R. Cohen-Adad, F. Paulik, and J. Paulik (1977): "Equilibres solide ⇄ liquide ⇆ vapeur du systeme binaire CoCl
2-H
2O" Journal of Thermal Analysis, volume 11, issue 1, pages 87–100. doi:10.1007/BF02104087 Note: the lowest point of fig.6 is inconsistent with fig.7; probably should be at -27.8 C instead of 0 C. - ^ Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. ISBN 978-0-08-037941-8.