White carbon black Precipitated silica white powder Molecular formula:SiO2nH2O Have rubber,tyre,sole,medicine,feed,food grade WHITE SILICAChemical name: Silica, precipitated, ... for rubber soles with high reinforcing effect as that of carbon black, and it can make rubber products with light color or ... woven bag made of polypropylene. Net weight is 20KGs. White carbon Black-Silicon dioxide precipitated