Precipitated Silica White powder Molecular formula:SiO2nH2O Have rubber,tyre,sole,medicine,feed,food grade WHITE SILICAChemical name: Silica, precipitated, ... powderUse:It is widely used in the shoe making and tyre industry, besides these it may be used for the following ... bag made of polypropylene. Net weight is 20KGs. Precipitated Silica tyre grade