Barium Sulfate : Spec: BaSO4: 98% min Moisture:0.30% max Water Soluble Matters:0.30% max Iron (on Fe basis):0.004% max PH Value(100g/l):6.5-9.0 Whiteness:96% min Oil Absorption (g/100g):15-30 max Particle size: D50 2um Packing: in 25kg plastic woven bags with film lining Application: Mainly used in paint, coating and resin industries.