Precipitated Silica White powder Molecular formula:SiO2nH2O Have rubber,tyre,sole,medicine,feed,food grade WHITE SILICAChemical name: Silica, precipitated, hydrated, White carbon ... chemical properties, it is the best transparent reinforcement additive in rubber-based blends. It can greatly improve the aging resistance, ... bag made of polypropylene. Net weight is 20KGs. Precipitated Silica tyre grade