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| Carbonates |
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| Magnesium carbonate |
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Chemical Name: | Magnesium carbonate , Basic Magnesium carbonate | Molecular Formula: | xMgCO3·yMg(OH) 2·nH2O | CAS: | 39409-82-0 | Character: | In normal temperature, it’s with three hydrates. Light one is white, easily fragile or loose white powder. Odorless. Relative density is 2.2. Melting point is 350℃. It’s stable in the air. When heated to 700℃, it will become magnesium oxide. It’s hardly soluble in water, but it’ll bring a slight alkaline reaction. It can not be soluble in ethanol but it could be soluble in olefine acid with sparkling. | Uses: | It’s used as drier, color ficatives, anticaking agent, carrier, swelling agent, acidity regulator. | Packing: | It is packed with polythene bag as the inner layer, and a compound plastic woven bag as the outer layer. The net weight of each bag is 25kg. | Storage & Transportation: | It should be stored in a dark, dry and ventilative warehouse, kept away from water and moisture; unloaded with care to avoid damage. Furthermore, it must be stored separately from poisonous substances. | Quality index: | Quality index | GB 25587-2010 | FCC-V | Assay(MgO)% | 40.0-44.0 | 40.0-43.5 | Acid insoluble matter≤% | 0.05 | 0.05 | Heavy Metal (Pb) ≤% | 0.001 | 0.002 | Calcium oxide≤% | 0.6 | 0.6 | Soluble salt≤% | 1.0 | 1.0 | Pb≤% | --- | 0.001 | As≤% | 0.0003 | --- |
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