Heavy calcium carbonate

Heavy calcium carbonate white powder of high white, brightness and purity. Used in Paint, Dope, Rubber, PVC pipe, Paper making etc as stuff materials. Heavy calcium carbonate specification MW: 100.09 CaCO3 contents: 98.5% Fe2O3 contents: 0.03% SiO2 contents: 0.02% Al 2O3 contents: 0.01% Size: 325mesh, 400mesh, 600mesh, 800mesh. Whitenss: degree 96 % Moisture : <0.2% Oil absorption value: 18-27 DOP absorption value c.c/ 100g : 21 40 D97 (um) :4 25 PH value: 8.5 9.5 Denstiy (g/cm3): 2.7 Heavy metal( as Pb): 0.001% max