TERMIUM Plus^®

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A chemical compound having the formula MgO which appears under the form of a noncombustible, white, alkaline powder, either light or heavy depending upon whether it is prepared by heating magnesium carbonate or the basic magnesium carbonate, is slightly soluble in water, soluble in acids and ammonium salt solutions, insoluble in alcohol, combines with water to form magnesium hydroxide, occurs naturally as the mineral periclase, is derived(1) by calcining magnesium carbonate or magnesium hydroxide,(2) by treating magnesium chloride with lime and heating or by heating it in air,(3) from seawater via the hydroxide, and is used as an inorganic rubber accelerator, a polycrystalline ceramic for aircraft windshields, in refractories, especially for steel furnace linings, for electrical insulation, in fertilizers, oxychloride and oxysulfate cements, paper manufacture, pharmaceuticals and cosmetics, semiconductors, for the removal of sulfur dioxide from stack gases and as a feed additive and in the food industry(mainly for the deacidification of butter, cooa, and some canned or frozen foods).  7, fiche 1, Anglais, - magnesium%20oxide

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Two forms are produced, one termed "Light," a fluffy material prepared by a relatively low-temperature dehydration of the hydroxide, the other termed "Heavy," a dense material made by high-temperature furnacing of the oxide after it has been formed from the carbonate or hydroxide.  7, fiche 1, Anglais, - magnesium%20oxide

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Also known under a large number of commercial designations, among which: Akri-Mag; Anima; Granmag; Magchem 100; Magox; Magox 85; Marmag; Oxymag; seawater magnesia.  7, fiche 1, Anglais, - magnesium%20oxide

Fiche 1,  Justifications,  Français

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Poudre alcaline blanche utilisée principalement pour désacidifier le beurre, le cacao, certaines denrées en boîte ou congelées.  4, fiche 1, Français, - oxyde%20de%20magn%C3%A9sium

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[On distingue notamment la] magnésie calcinée légère, ou magnésie française, et la magnésie calcinée lourde, ou magnésie anglaise [...]  5, fiche 1, Français, - oxyde%20de%20magn%C3%A9sium

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Formule chimique : MgO  6, fiche 1, Français, - oxyde%20de%20magn%C3%A9sium

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Fiche 2,  Justifications,  Anglais

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A chemical product in the form of hexahydrate, deliquescent crystals used in the preparation of magnesia mixture and anhydrous magnesium chloride.  2, fiche 2, Anglais, - ammonium%20magnesium%20trichloride

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Chemical formula: Cl₃H₄MgN  2, fiche 2, Anglais, - ammonium%20magnesium%20trichloride

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Formule chimique : Cl₃H₄MgN  2, fiche 2, Français, - trichlorure%20d%27ammonium%20et%20de%20magn%C3%A9sium

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Fiche 3,  Justifications,  Anglais

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The ammonium ion(NH4+) in rain and snow tends to increase the pH. In coastal areas sea spray may contribute significantly to the chemistry of precipitation. Here the important ions added are the ones most abundant in seawater, namely the cations Na+ and Mg+(sodium and magnesium), the anion Cl-(chloride) and to a lesser extent cations ion of calcium and potassium(Ca++, K+) and anions of sulfate(SO4--).  1, fiche 3, Anglais, - important%20ion

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Fiche 3,  Justifications,  Espagnol