This product can be used in soles, tire, silicon rubber, plastic, painting and medicine. Precipitated Silica (amorphous powder and granule,silicon dioxide)We provides excellent silica for rubber, tyre, papermaking.Precipitated Silica (amorphous powder and granule , silicon dioxide) Common property: It is a white amorphous powder and granule that dissolves in caustic alkali and hydrofluoric acid. ...