... making material,additive of plastic,polyester,cover of cable and wire. Product Description of Precipitated Silica(White Carbon ... suspension): 6.80-7.40 Percent content of SiO2, %: ≥ 92 Content of Fe, mg/kg: ≤350 NaSO4 content, ... of plastic and polyester, cover of cable and electric wire, strenghthening agent of light colored rubber, carrier of forage additive, pigment additive. Precipitated Silica ...