Chemical Property of Calcium Bromide
Chemical Property:
- Appearance/Colour:white powder
- Vapor Pressure:0Pa at 25℃
- Melting Point:730 °C
- Boiling Point:806-812°C
- Flash Point:806-812°C
- PSA：0.00000
- Density:3.353 g/cm3
- LogP:-5.99200
- Sensitive.:Hygroscopic
- Water Solubility.:Soluble in water, methanol, ethanol and acetone. Insoluble in dioxane, chloroform and ether.
- Hydrogen Bond Donor Count:0
- Hydrogen Bond Acceptor Count:2
- Rotatable Bond Count:0
- Exact Mass:199.79722
- Heavy Atom Count:3
- Complexity:0
- Purity/Quality:
-
99% *data from raw suppliers
Calcium bromide, anhydrous (99.5%-Ca) *data from reagent suppliers
Safty Information:
- Pictogram(s):
Xi
- Hazard Codes:Xi
- Statements:
38-41
- Safety Statements:
22-24/25-39-26
- MSDS Files:
-
SDS file from LookChem
Useful:
- Chemical Classes:Metals -> Metals, Inorganic Compounds
- Canonical SMILES:[Ca+2].[Br-].[Br-]
- Inhalation Risk:A nuisance-causing concentration of airborne particles can be reached quickly when dispersed.
- Effects of Short Term Exposure:The substance is irritating to the eyes, skin and respiratory tract.
- Effects of Long Term Exposure:Repeated or prolonged contact with skin may cause dermatitis. Ingestion may cause effects on the central nervous system.
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Uses
Calcium bromide (CaBr2) is used as a developer for photographic film and paper and as a
dehydrating agent (drying agent), food preservative, and fire retardant. In photography for making dry plates and light-sensitive papers; manufacture of mineral waters, NH4Br, fire-extinguishing compositions. Made 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. Calcium 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.
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Description
Calcium 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.
