800mesh Average particle size: 18?.5祄 Moisture: 0.3%max #400 Sieve Reside: 93min Whiteness: 14-19% Oil Absorption: Max0..2% Soluble in Water: 0.2%max PH Value: 7.5-9.5 BaSO4 Purity: 97%min HCL Insoluble Matter: 96.5%min True Specific Gravity: 4.3G/cm3