... Molecular formula:SiO2nH2O Have rubber,tyre,sole,medicine,feed,food grade WHITE SILICAChemical name: Silica, precipitated, hydrated, White carbon blackMolecular formula ... .Used for [medicine, feedstuff]: Used for [silicon rubber]: For its special physical and chemical properties, it is the best transparent reinforcement ... made of polypropylene. Net weight is 20KGs. Precipitated Silica tyre grade