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| Calcium bromide, formula CaBr2. Chemical formula CaBr2. Molecular weight 199.90. Colorless rhombic crystals. Easy deliquescence. Melting point 730℃(with trace decomposition), boiling point 806 ~ 812℃, relative density 3.35325. The hexahydrate is a colorless hexagonal crystal with a melting point of 38.2℃, a boiling point of 149℃ and a relative density of 2.295. Soluble in water, ethanol and acetone, slightly soluble in liquid ammonia. Its aqueous solution is neutral or slightly alkaline. It is prepared by the interaction of hydrobromic acid with calcium oxide, lime milk or calcium carbonate, or by passing ammonia into lime milk and adding bromine. Should be sealed and stored away from light. It is used in the photographic industry. | |||||||||
7789-41-5
boss chem
7789-41-5
Calcium bromide anhydrous
CAS No.7789-41-5
Alias: Calcium bromide anhydrousReagent grade, ≥ 99.5% (Assay);Calcium bromide solution;CALCIUM (II) BROMIDE;CALCIUM BROMIDE;CaBr2;Calcium bromide (CaBr2);calciumbromide(cabr2);calciumbromideanhydrous
Molecular formula: Br2Ca
Relative molecular mass: 199.89
Structural formula:
1. Performance and use:
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.
2. Technical indicators
| Test Item | Standard | Result |
| Content 含量 | ≥98% | 98.52% |
| Chloride 氯化物 | ≤0.08% | 0.03% |
| Sulphate 硫酸盐 | ≤0.05% | 0.01% |
| Appearance 外观 | White Powder 白色粉末 | |
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