... white carbon black.Low price and good quality. Usage: In the industries of paper, soap, detergent, construction materials, delicate casting, anti- ... select. And it is primary raw material of silicon rubber, silicon aluminum rubber, moisture absorbent, catalyst and its carrier, desalt agent of brine, hydrated ... 2.92.2-2.52.2-2.5Fe ,% <0.02Insolubles In water,% <0.2 Water glass(Sodium Silicate)