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Both the wet and thermal routes produce synthetic amorphous Silicon Dioxide; however, the physical properties of the particles produced by these processes vary significant. It is these properties that dictate usage. For example, the extremely high internal surface area and high porosity of silica gels make these powders ideally suited for use as a carrier of flavors or filtering aid for clarification of beverages. Self-LimitinP Levels of Use: There is no self-limiting factor for the use of silicon dioxide in food or food-packaging materials. Silica will be used in an amount that is reasonably needed to produce the intended effect. Therefore, silicon dioxide will be used in accordance with good manufacturing practices.

Silicon Dioxide is a natural mineral formation, it also contain in the market sold vitamin supplements. Typically, the silica is used as anti-caking agent, take together with  balanced die, it helps to restore joint and cartilage damage, such as arthritis. In addition, it is beneficial to healthy vessel wall. Like excessive consumption of multivitamins, as excessive intake of silicon dioxide can also cause side effects. However, the use as an anti-caking agent, very small amount of silica. Thus, as an anticaking agent, silica does not cause side effects. 

There are three types of Silicon Dioxide anti-caking agent in food additives, fumed silica, precipitated silica, gel silica categories. White powder synthetic silica having a large specific surface area, porosity, adsorption strong, chemically very stable, non-toxic, tasteless. As a food additive with anti-caking agent silica, to maintain a dry powdered medicament and mobility, prolonged prevent agglomeration. Through the consumption of additives with silica, weak base cavity environment, gastric acid environment, weak intestinal environment does not decompose, does not absorb, and finally discharged together with the stool. It is noteworthy that the air free silica content higher than a certain value (respirable silica dust: dust aerodynamic diameter of this standard refers to respirable dust are collected at 7.07μm or less, and an aerodynamic diameter of 5μm collection efficiency is 50% dust respirable dust. the free silica content of 10% or more are known as respirable silica dust. Workplace air containing 10% to 50% free silica in respirable silica dust in the maximum allowable concentration 1mg / m3. Workplace air containing more than 50 % to 80% free silica in respirable silica dust in the maximum allowable concentration 0.5mg / m3. Workplace air containing more than 80% of free silica respirable silica dust in the maximum allowable concentration of 0.3mg / m3.), in such a work environment long-term exposure (weak physical constitution of weeks, physical strength of a few years) may suffering from silicosis.



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