Barium Sulphate Molecular Formula: BaSO4 Molecular Weight: 233.40 Specification: Barium Sulphate (as drying base) 98% Min PH Value (100g/suspending matter) 6.5_8 Water-soluble 0.2% Max Iron(Fe) 0.004% Max Sulphite 0.003% Max 45um sieve residue 0.1% Max Oil absorption (g/100g) 15_25% Whiteness 94% Min Acetic acid 0.6% Max Moisture 0.2% Max Packing: Net each in 25kg plastic woven bag, lined with PE bag.