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1. Chemical Name: MAGNESIUM CARBONATE
2. Molecular Formula: xMgCO3·yMg(OH) 2·nH2O
3. CAS: 39409-82-0
4. Character: In normal temperature, magnesium carbonate (cas no. 23389 33 5/39409 82 0) is 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.
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| Specification | GB 25587-2010 | FCC V |
| Content (MgO)% | 40.0~44.0% | 40.0~43.5% |
| Insolubles in Acid ≤% | 0.05% | 0.05% |
| Heavy Metals (As Pb) ≤% | 0.001% | ---- |
| CaO ≤% | 0.6% | 0.6% |
| Soluble Salts ≤% | 1.0% | 1.0% |
| Pb ≤% | ---- | 0.0002% |
| Arsenic ≤% | 0.0003% | ---- |
It’s used as drier, color ficatives, anticaking agent, carrier, swelling agent, acidity regulator.
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.
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.
