Barium Sulphate Superfined Chemical formula: BaSO4 Molecular Weight: 233.33 Typical Analysis:Purity 98.00% min. PH 7-9 Quantity of Absorbing Oil 15-25% 325 Mesh Residue 0.08% max. Fe0.0015% max. Whiteness 98.5% min. Moisture 0.10% max. Water Soluble Matter 0.15% max. Average Particle Size (D50) (um) 0.3-0.4