Barium Carbonate Molecular formula: BaCO3 Property: White free flowing powder or white amorphous granular. Specification: 1)BaCO3: 99.2% min 2)Insoluble in HCL: 0.15% max 3)SO4: 0.2% max 4)Fe: 0.004% max 5)Moisture: 0.3% max 6)Average diameter of particle(um): 2.97 Usage: It is used as raw and processed materials for making barium salt, pigment, optical glass, paint, pottery and radio well and so on.