Calcium bromide, ultra dry, 99.978% (metals basis)
Basic information
- CAS
7789-41-5- Standard SMILES
[Br-].[Br-].[Ca+2]- InChIKey
WGEFECGEFUFIQW-UHFFFAOYSA-L- Molecular formula
- Br2Ca
- Average molar mass
- 199.89 g/mol
- Monoisotopic mass
- 197.79927
Overview
See also: Calcium Bromide (preferred).
Names & identifiers
- Preferred name
- Calcium bromide, ultra dry, 99.978% (metals basis)
- IUPAC
- calcium dibromide
- English name
- Calcium bromide
- Molecular formula
- Br2Ca
- Molecular weight
- 199.89
Names & synonyms
Calcium bromide [JAN]EINECS 232-164-6UNII-87CNY2EEBHCalcium bromide, ultra dry , 99.978% (metals basis)HSDB 8493Calcium bromide (JAN)EC 232-164-6Brocal (TN)Ca Br2Calcium bromide, anhydrousCalcium bromide, ultra drySCHEMBL28133914
Show more names
CaBr2BrocalC13189DibromocalciumCALCIUM BROMIDEcalciumdibromideCALCIUM BROMIDE 52%Calcium bromide，98%Calcium Bromide 96%CALCIUM (II) BROMIDE
AKOS015902774D01723Calcium bromide, anhydrous, beads, -10 mesh, 99.98% trace metals basis
Database identifiers
- CAS
7789-41-5- PubChem CID
- 24608
Properties
Computed structural properties
- Topological polar surface area
- 0 Ų
- Hydrogen bond donors
- 0
- Hydrogen bond acceptors
- 2
- Rotatable bonds
- 0
- Heavy atoms
- 3
- Formal charge
- 0
- Complexity
- 2.8
Physicochemical properties
- Melting point
- 730 °C · 730°C
- Boiling point
- 806 · 806-812°C
- Density
- 3.353 g/mL · 3.353 g/mL at 25 °C (lit.)
- vapor pressure
- 0 Pa · 0Pa at 25℃
- Flash point
- 806 · 806-812°C
- solubility
- soluble in ethanol, acetone
- form
- beads
- color
- White to off-white
- Specific Gravity
- 3.353 · 3.353
- Odor
- gran. or rhombic cryst., odorless, sharp saline taste
- Water Solubility
- Soluble in water, methanol, ethanol and acetone. Insoluble in dioxane, chloroform and ether.
- Sensitive
- Hygroscopic
- Merck
- 14 · 14,1654
- Stability
- hygroscopic
- InChI
- 1S/2BrH.Ca/h2*1H;/q;;+2/p-2
- InChIKey
- WGEFECGEFUFIQW-UHFFFAOYSA-L
- SMILES
- Br[Ca]Br
Safety & regulation
Safety information is for reference only and does not replace the supplier’s Safety Data Sheet (SDS), applicable regulations, or professional assessment.
Safety data
- wgk
- 2
- tsca
- TSCA listed
- rtecs
- EV9328000
- hs_code
- 2827590000
- risk_code
- 38-41
- Signal word
- Danger
- Symbol(GHS)
- GHS05
- hazard_code
- Xi
- safety_code
- 22-24/25-39-26
- Storage Class
- 11 - Combustible Solids
- Hazard statements
- H318
- REACH Registrations
- Active
- Hazard Classifications
- Eye Dam. 1
- Precautionary statements
- P280-P305+P351+P338
- Hazardous Substances Data
- 7789-41-5(Hazardous Substances Data)
Chemistry & industry
Applications
UsesCalcium bromide (CaBr2) is used as a developer for photographic film and paper and as a dehydrating agent (drying agent), food preservative, and fire retardant.
DescriptionCalcium bromide has the chemical formula CaBr2. It was first prepared by Pfeiffer, Klossmann and Angern in 1924. It is a deliquescent salt that has the form of colorless hexagonal crystals that are soluble in water and absolute alcohol. Its molecular weight is 199.90 g/ mol for the anhydride. When strongly heated in air, calcium bromide will produce CaO (lime) and Br2. It is generally obtained as the dihydrate, CaBr2·2H2O, in the form of a white crystalline powder. A hexahydrate, CaBr2·6H2O, is also known. Anhydrous calcium bromide is obtained by dehydration (250°C, vacuum) of the dihydrate CaBr2·2H2O. On contact with hot surfaces or flames, CaBr2 decomposes forming bromine as a toxic and corrosive fume. It also reacts with strong acids to produce corrosive fumes of bromine. In its solid anhydrous state, it is a white powder. CaBr2 can be found in drilling muds, neuroses medication, freezing mixtures, food preservatives, photography and fire retardants. The anhydride has a melting point of 730°C and a boiling point of 810°C where it decomposes. Its density is 3.41 g/cm3. It is moderately soluble in water at 142 g/100 ml of water.
UsesIn photography for making dry plates and light-sensitive papers; manufacture of mineral waters, NH4Br, fire-extinguishing compositions.
UsesMade by the action of hydrobromic acid on calcium oxide and crystallization. The white granular crystals are soluble in water. Calcium bromide was used in making collodion emulsions, particularly for dye-sensitized plates.
UsesCalcium bromide has a number of useful applications. Used in the oil and gas fields, the compound is a true working example. At almost every stage of the oil and gas extraction process, calcium bromide has found extensive usage. Stability, dependability and ease of use distinguish calcium bromide in the drilling process. There, it is used in “drilling muds” worldwide.
Preparation methods
PreparationCaBr2·2H2O has a melting point of 38°C where it dissolves in its own waters of hydration. Its density is 2.290 g/cm3. It can be prepared by reaction in solution with HBr on the carbonate: CaCO3 (solid)＋HBr (liq)→CaBr2 (liq)＋ CO2 (gas) An improved method for producing calcium bromide has been developed by reacting hydrogen bromide with calcium hydroxide in the presence of water.
Related reactions
0 records
No reaction records under the current filter.
Compound notes
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