98% Barium Sulphate Precipitated

We are using "method of sulphate" to produce Barium Sulphate Precipitated instead of "method of Glauber's salt", our BaSO4 has very good whiteness as follows: Components: Guaranteed Analysis: Typical Value: Methods: BaSO4(as dry): 98.0% min 98.7% GB/T2899-1996 PH Value: 6.0-9.0 7.6 GB/T2899-1996 Water Soluble Matter: 0.3% max 0.2% GB/T2899-1996 Whiteness: 94% min 97% GB/T2899-1996 Iron(Fe): 0.004% max ≤0.003% GB/T2899-1996 Oil Absorption(g/100g): 10-30 16.5-21 GB/T2899-1996 Volatile Matter(105 °C): 0.3% max. 0.08% GB/T2899-1996 Particle Size (Residue on 45µm Sieve): 0.2% max 0.05% GB/T2899-1996 More detailed information, please kindly contact us! ------------------------------------------------------------------------------------------------ -We Finished Pre-Registration As Per Reach With 19 Kinds Of Chemicals. -We Have Already Obtained Certificate of "Fami-Qs" Through Bv. -We Have Already Obtained Certificate of "ISO9001:2008" Through SGS -----------------------------------------------------------------------------------------------