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Calcium bromide

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Calcium bromide
Names
IUPAC name
Calcium bromide
Other names
Calcium dibromide
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.029.240 Edit this at Wikidata
RTECS number
  • EV9328000
UNII
  • InChI=1S/2BrH.Ca/h2*1H;/q;;+2/p-2 checkY
    Key: WGEFECGEFUFIQW-UHFFFAOYSA-L checkY
  • InChI=1/2BrH.Ca/h2*1H;/q;;+2/p-2
    Key: WGEFECGEFUFIQW-NUQVWONBAA
  • [Ca+2].[Br-].[Br-]
Properties
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)
810 °C (dihydrate)
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
rhomboid
Hazards
Occupational safety and health (OHS/OSH):
Main hazards
 Decomposes on heating at high temperature producing toxic and corrosive fumes
NFPA 704 (fire diamond)
NFPA 704 four-colored diamondHealth 1: Exposure would cause irritation but only minor residual injury. E.g. turpentineFlammability 0: Will not burn. E.g. waterInstability 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g. liquid nitrogenSpecial hazards (white): no code
1
0
0
Lethal dose or concentration (LD, LC):
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
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
checkY verify (what is checkY☒N ?)

Calcium bromide is the calcium salt of hydrobromic acid with the chemical formula of CaBr2. 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

  1. ^ "Chemical Land 21". Retrieved 25 December 2008.


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