1、Chemical Name: Magnesium Carbonate

2、Molecular Formula: xMgCO₃·yMg(OH) ₂·zH₂O

3、Molecular Weight: —

4、CAS: 39409-82-0

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.

质量指标	Specification	GB 25587-2010	FCC VII
含量(MgO) ，w/%	Content (MgO), w/%	40.0-44.0	40.0-43.5
酸不容物，w/%          ≤	Acid-insoluble substances ,w/%   ≤	0.05	0.05
重金属（以Pb计），w/%  ≤	Heavy metals (As Pb),w/%      ≤	0.001	————
氧化钙，w/%            ≤	CaO, w/%                   ≤	0.60	0.6
可溶性盐，w/%         ≤	Soluble salts, w/%            ≤	1.0	1.0
铅（Pb），mg/kg           ≤	Pb, mg/kg                    ≤	————	2.0
砷（As），mg/kg         ≤	Arsenic(As),mg/kg          ≤	3	————