Characteristic

Barium bromide is the chemical compound with the formula BaBr₂. Like barium chloride, it dissolves well in water and is toxic.

Chemical formula：BaBr₂ (anhydrous)

                                BaBr₂·2H₂O (dihydrate)

Molar mass：297.14 g/mol

Appearance：White solid

Density：4.78 g/cm³ (anhydrous)

               3.58 g/cm³ (dihydrate)

Melting point：857 °C (1,575 °F; 1,130 K)

Boiling point：1,835 °C (3,335 °F; 2,108 K)

Solubility in water：92.2 g/100 mL (0°C)

Magnetic susceptibility (χ)：-92.0·10⁻⁶ cm³/mol

Crystal structure：orthorhombic, oP12

Application

Barium bromide is a precursor to chemicals used in photography and to other bromides.

Historically, barium bromide was used to purify radium in a process of fractional crystallization devised by Marie Curie. Since radium precipitates preferentially in a solution of barium bromide, the ratio of radium to barium in the precipitate would be higher than the ratio in the solution.