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Frequently Ask Questions

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What is silica gel?

Silica gel is silicon dioxide (SiO2). It is a naturally occurring mineral that is purified and processed into either granular or beaded form. As a desiccant, it has an average pore size of 24 angstroms and has a strong affinity for moisture molecules. The silica gel will pull in moisture at temperatures up to 220░F (105░C). As temperature goes above 100░F, the rate of moisture pick-up will slow down but the silica gel will still work. Silica gel performs best at room temperatures (70░ to 90░F) and high humidity (60 to 90% Rh) and will drop the relative humidity in a container down to around 40% Rh. In the United States, silica gel is commonly used in food and pharmaceutical applications as only silica gel has been approved by the FDA for direct contact with these items.

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