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silica gel |
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silica gel, chemical compound. It is a colloidal form of silica silica or silicon dioxide, chemical compound, SiO2. It is insoluble in water, slightly soluble in alkalies, and soluble in dilute hydrofluoric acid. Pure silica is colorless to white. ..... Click the link for more information. , and usually resembles coarse white sand. It may be prepared by partial dehydration of metasilicic acid, H2SiO3. Because it has many tiny pores, it has great adsorptive power. It is used as a drying agent, as a catalyst or catalyst carrier, and in purifying various substances. Silica aerogel aerogel, any of a group of extremely light and porous solid materials; the lightest is less than four times as dense as dry air. Aerogels are produced from certain gels (see colloid ) by heating the gel under pressure, which causes the liquid in the gel to become ..... Click the link for more information. is fully dehydrated silica gel; it is very porous and is often used in insulation, e.g., for refrigerators. A highly absorbent form of silicon dioxide often wrapped in small bags and packed with equipment to absorb moisture during shipping and storage. |
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Silcron amorphous, fine-particle silica gel in a variety of grades performs as a thixotrope and flaring agent, in addition to preserving clarity and smoothness of finish. Perhaps eating that poisonous desiccant silica gel just may pay off after all - even though there's no nicotine. Amorphous and precipitated silica and silica gels, prepared by the acidification of a solution of sodium silicate, are commonly used in premium matte coated ink-jet papers. |
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silica gel
