BoCO3: 99. 2%min Moisture: 0. 3%max Diegs of hydrochloric acid insoluble matter burned: 0. 15%max SO4: 0. 25%max Fe: 0. 004%max Granular: 125um: 0. 2%max 850um: 0. 1%max 150um: 75%min Molecular formula: BaCO3 Molecular weight: 197. 35 Use: It is used as raw and processed materials for making inkstone salt, pigment, optical glass, paint, pottery and porealain, radio well and so on. Package: Weave bag with plastic film in it, neutral package