Precipitated Barium Sulfate

We are offering precipitated barium sulfate 800mesh. 800 mesh: 1) average particle size: 18±0.2um 2) moisture: 24±2um 3) #325 sieve reside: 0.4% max. 4) whiteness: 95min 5) oil absorption: 17% 6) soluble in water: 0.2% max. 7) ph value: 6.5 - 8.5 8) baso4 purity: 98% min. 9) hcl insoluble matter: 99.6% min.