Barium chloride dihydrate (BaCl2•2H2O)-Crystalline

Characteristic

Barium chloride is the inorganic compound with the formula BaCl₂. It is one of the most common water-soluble salts of barium. Like most other barium salts, it is white, toxic, and imparts a yellow-green coloration to a flame. 

Chemical formula：BaCl₂•2H₂O

Molar mass：208.23 g/mol (anhydrous);244.26 g/mol (dihydrate)

Appearance：White solid

Density:3.856 g/cm³ (anhydrous);3.0979 g/cm³ (dihydrate)

Melting point:962 °C (1,764 °F; 1,235 K) (960 °C, dihydrate)

Boiling point:1,560 °C (2,840 °F; 1,830 K)

Solubility in water:31.2 g/100 mL (0 °C);35.8 g/100 mL (20 °C);59.4 g/100 mL (100 °C)

Solubility:soluble in methanol, insoluble in ethanol, ethyl acetate

Magnetic susceptibility (χ):-72.6·10⁻⁶ cm³/mol

Crystal structure:orthogonal (anhydrous);monoclinic (dihydrate)

Application

Barium chloride dihydrate is mainly used in the purification of brine solution in caustic chlorine plants, as a reagent in the test for sulfate ion in chemical lab, and as a cleansing agent in the production of other barium chemicals and lubricating oil additives. It is used in the production of molecular sieves, pigments, and paper coatings, and serves as a precursor to fabricate the doped barium zirconate.