Melting point 925°C, Boiling point1560°C, Relative Density 3.85624. As analytical reagent, Dehydrant, making barium salt, and used in electronic, instrument, metallurgical industry, etc.. Physical Properties; white crystal or granular powder. Relative Density 3.86. Melting point 963°C. Refractive index 1.635. Uses: test sulfate and selenate, Chromatographic analysis, spot analysis for the determination of platinum,. water softener. dyeing of fabrics. . Also used in the heat treatment of metal, making barium salt, electronic instrument,. or used as water softener,. Dehydrant & analytical reagent, heat treatment agent in machining operation.