Calcium bromide (CaBr2)-Powder

Characteristic

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.

Chemical formula: CaBr₂

Molar mass: 199.89 g/mol 

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) 

Solubility in water: 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

Application

Calcium bromide is a dehydrating agent used in photography, food preservatives, wood preservatives, fire retardants and freezing mixtures. It is used as an oxidizer for mercury emissions control. It is widely used for the preparation of drilling fluids, completion fluids and drilling muds formulations. It also finds application in the manufacture of mineral water.