silicon dioxide as feed additive Precipitated silica with special physic-chemical properties, work as reinforcing transparent fillers highly valued in formulation of rubber-based blends. In particular, They lead to enhanced tensile strength, tear strength and abrasion resistance and increase hardness of vulcanized rubbers. On the other hand, They reduce consumption of rubbers and therefore reduce the cost.1) For Light-colored, color and High-grade transparent rubber products. 2) For PE, PP, powder products as filler with good fluidity property.3) As food additives, feed additives, Pesticide carrier with good fluidity and anti-caking property.4) For glass cement, sealant, painting, coating, printing ink, as thickener and Anti precipitating agent.5) for others.Assay:90.0%minAppearance:white crystal or powderLoss on drying:4-8%maxLoss on ignition:7%maxPh:5-8 Density:2.6 g/mL at 25 °C(lit.)Melting Point:1610 °C(lit.)Boiling Point:>100 °C(lit.)