Hydrated silica is a fine and special chemical product white in color. Its main composition is SiO2. Hydrated silica is indissoluble, thermo stable, non-flame, non-pollution. Electric insulation and parable. It is mainly used as rubber strengthening agent and additives. It can be used to manufacture white, transparent rubber products. Hydrated silica is also widely used in the industries of plastic, Paint, ink, Paper, Pharmaceutics, Daily chemicals and food because of its non-toxicity and lack of sent.