碳酸

一、化学名：碳酸，碱式碳酸
二、分子式：xMgCO3?yMg(OH) 2?nH2O
三、分子量：----
四、CAS: 39409-82-0
五、性状：常温时为三水盐。轻质为白色易碎块状或松散的白色粉末。无臭。相对密度2.2。熔点350℃。在空气中稳定。加热至700℃发生，生成氧化。几乎不溶于水，但在水中引起轻微的碱性反应。不溶于，可被烯酸溶解并发泡。
六、用途：碱性剂；干燥剂；护色剂；抗结剂；载体；膨松剂；酸度调节剂。
七、包装：净重25kg，复合牛皮纸袋内衬聚氯袋；
八、储运与运输：应贮在阴凉、干燥、通风清洁的库房中，轻装轻放，防止受潮、受热，运输过程中防止雨淋受潮，应与有毒物品隔离堆放。

质量指标	Specification	GB25587-2010	FCC,1996
含量(MgO) ,w/%       	Content (MgO)	40.0-44.0	40.0-43.5
酸不容物,w/%            ≤	Insolubles in Acid	0.05	0.05
重金属（以Pb计）,w/%   ≤	Heavy Metals（As Pb）	0.001	0.002
氧化钙,w/%              ≤	CaO	0.6	0.6
可溶盐,w/%              ≤	Soluble Salts	1.0	1.0
铅(Pb),mg/kg            ≤	Pb	——	10
砷（As）,mg/kg          ≤	Arsenic	3	——

1、Chemical Name: MAGNESIUM CARBONATE
2、Molecular Formula: xMgCO3?yMg(OH) 2?nH2O
3、Molecular Weight: ---
4、CAS: 39409-82-0
5、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.
6、Usage: It’s used as drier, color ficatives, anticaking agent, carrier, swelling agent, acidity regulator.
7、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.
8、Storage and Transport: 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.