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Silica gel, also referred to as silicon dioxide or synthetic amorphous silica (SAS), is listed by the FDA in the United States as generally recognized as safe (GRAS), meaning it can be added to food products without needing approval. Silica is allowed to be added to food in the US at up to 2% as permitted under 21 CFR 172.480.
Fumed silica is generally accepted as safe as a food additive [4] and is frequently used in cosmetics. Additives such as precipitated silica, fine talc, or chalk also meet the definition of thickening agent in that they increase viscosity and body while not affecting the target property of a mixture. [citation needed]
Canisters are commonly filled with silica gel and other molecular sieves used as desiccant in drug containers to keep contents dry. Silica gel in a sachet or porous packet. A desiccant is a hygroscopic substance that is used to induce or sustain a state of dryness (desiccation) in its vicinity; it is the opposite of a humectant.
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Silicon dioxide, also known as silica, is an oxide of silicon with the chemical formula SiO 2, commonly found in nature as quartz. [5] [6] In many parts of the world, silica is the major constituent of sand. Silica is one of the most complex and abundant families of materials, existing as a compound of several minerals and as a
Silica gel litter: Made from silica crystals, this litter is lightweight, highly absorbent, and excellent at controlling odors. It requires less frequent changes but can be more expensive.