| Specification | GB 25587-2010 | FCC VII |
| Content (MgO),w/% | 40.0-44.0 | 40.0-43.5 |
| Acid-insoluble substances,w/% ≤ | 0.05 | 0.05 |
| Heavy metal (as Pb),,mg/kg ≤ | 10.0 | ———— |
| CaO,w/% ≤ | 0.6 | 0.6 |
| Soluble salts,w/% ≤ | 1.0 | 1.0 |
| Lead (Pb),mg/kg ≤ | ———— | 2.0 |
| Arsenic (As),mg/kg ≤ | 3.0 | ———— |
1、Chemical Name: Magnesium Carbonate
2、Molecular Formula : MgCO3 ; 4MgCO3·Mg(OH)2·5H2O ; MgCO3·H2O
3、Molecular Weight : Anhydrous: 84.32 ; Basic type: 485.706 ; Monohydrate:102.34
4、CAS: Anhydrous:546-93-0; Basic type:39409-82-0; Monohydrate:23389-33-5
5、Character: Magnesium carbonate (light density) is white, friable masses or unconsolidated white odorless powder. Relative density is 2.2 and melting point is 350℃. It’s stable in air. When heated to 700℃, it decomposes to carbon dioxide and magnesium oxide. It’s almost insoluble in water, but it imparts a slight alkaline reaction. It is insoluble in ethanol, but dissolves in dilute acids with effervescence.
6、Usage: It can be used as nutrient, flour treatment agent, anti-caking agent and leavening agent. It could also be used in wheat powder and gum ingredients.
7、Packing: It is packed with polyethylene bag as inner layer, and a compound plastic woven bag as outer layer. The net weight of each bag is 25kg.
8、Storage and Transport: It should be stored in a dry and ventilative warehouse, kept away from heat and moisture during transportation, unloaded with care so as to avoid damage. Furthermore, it must be stored separately from poisonous substances.