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Diatomaceous earth

Name (also mountain meal, celite, diatomaceous earth, silica flour, white earth) for a whitish, powdery substance consisting mainly of skeletons of fossil algae (diatoms = diatoms). The mostly unicellular diatoms lived with about 10,000 species in fresh, brackish or salt water The substance has many uses, for example in the production of toothpaste, car tyres and (with nitroglycerine) dynamite. Due to its highly porous properties, it is particularly permeable to liquids and is therefore an excellent filter aid in the filtration of wines. It also serves as an inert agent (carrier) when using silver chloride. A chemically related substance is silica sol, which is also used in wine making.

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