Calcium bromide

Calcium bromide is the name for compounds with the chemical formula CaBr2(H2O)x. Individual compounds include the anhydrous material (x = 0), the hexahydrate (x = 6), and the rare dihydrate (x = 2). All are white powders that dissolve in water, and from these solutions crystallizes the hexahydrate. The hydrated form is mainly used in some drilling fluids.

Calcium bromide
Names
IUPAC name
Calcium bromide
Other names
Calcium dibromide
Identifiers
3D model (JSmol)
ChEBI
ChemSpider
ECHA InfoCard 100.029.240
EC Number
  • 232-164-6
PubChem CID
RTECS number
  • EV9328000
UNII
  • InChI=1S/2BrH.Ca/h2*1H;/q;;+2/p-2 Y
    Key: WGEFECGEFUFIQW-UHFFFAOYSA-L Y
  • InChI=1/2BrH.Ca/h2*1H;/q;;+2/p-2
    Key: WGEFECGEFUFIQW-NUQVWONBAA
SMILES
  • Br[Ca]Br
  • [Ca+2].[Br-].[Br-]
Properties
CaBr2
Molar mass 199.89 g/mol (anhydrous)
235.98 g/mol (dihydrate)
Appearance anhydrous is hygroscopic colorless crystals
sharp saline taste
Density 3.353 g/cm3
Melting point 730 °C (1,350 °F; 1,000 K)
Boiling point 1,815 °C (3,299 °F; 2,088 K) (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
Magnetic susceptibility (χ)
 -73.8·10−6 cm3/mol
Structure
rhomboid
Thermochemistry
75 J/mol K
Std molar
entropy (S⦵298)
 130 J/mol K
Std enthalpy of
formation (ΔfH⦵298)
 -647.9 kJ/mol
-656.1 kJ/mol
Hazards
NFPA 704 (fire diamond)
1
0
0
Lethal dose or concentration (LD, LC):
LD50 (median dose)
 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).
N verify (what is YN ?)
Infobox references
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.