Calcium bromide
| Calcium bromide | |
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Calcium bromide
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Other names
Calcium dibromide
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| Identifiers | |
| CAS number | 7789-41-5  , 22208-73-7 (dihydrate) |
| PubChem | 24680 |
| ChemSpider | 23010 |
| RTECS number | EV9328000 |
| SMILES |
[Ca+2].[Br-].[Br-]
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| InChI |
1/2BrH.Ca/h2*1H;/q;;+2/p-2
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| InChI key | WGEFECGEFUFIQW-NUQVWONBAA |
| Properties | |
| Molecular formula | CaBr2 |
| Molar mass | 199.89 g/mol (anhydrous) 235.98 g/mol (dihydrate) |
| Appearance | Odorless, very hygroscopic colorless crystals sharp saline taste |
| Density | 3.353 g/cm3 |
| Melting point |
730 °C |
| Boiling point |
1935 °C (anhydrous) |
| Solubility in water | 125 g/100 mL (0 °C) 143 g/100 ml (20°C) 312 g/100 mL (100 °C) |
| Solubility in alcohol, acetone | soluble |
| Acidity (pKa) | 9 |
| Structure | |
| Crystal structure | rhomboid |
| Hazards | |
| Main hazards | Decomposes on heating at high temperature producing toxic and corrosive fumes |
| NFPA 704 |
 0
1
0
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| LD50 | 4100 mg/kg (rat, oral) 1580 mg/kg (mouse, subcutaneous) |
| Related compounds | |
| Other anions | Calcium fluoride Calcium chloride Calcium iodide |
| Other cations | Beryllium bromide Magnesium bromide Strontium bromide Barium bromide Radium bromide |
 (what is this?) (verify)Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) |
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| Infobox references | |
Calcium bromide (CaBr2) is a chemical compound of calcium and bromine. In its solid state, it is a white powder. CaBr2 can be found in drilling fluids, neuroses medication, freezing mixtures, food preservatives, photography and fire retardants.1
When strongly heated in air, calcium bromide will produce calcium oxide and bromine.
- 2 CaBr2 + O2 → 2 CaO + 2 Br2
In this reaction the oxygen oxidizes the bromide to bromine.
It may be formed by the reaction of calcium oxide with hydrobromic acid or the reaction of calcium metal with elemental bromine.
References
- ^ "Chemical Land 21". http://www.chemicalland21.com/industrialchem/inorganic/CALCIUM%20BROMIDE.htm. Retrieved 25 December 2008.
External links
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