名称碳酸镁	产品等级食品级
含量≥42％	品牌晶菱
型号食品级	厂家(产地)日照
粒度100-200目	执行质量标准GB25587-2010
CAS39409-82-0

一、化学名：碳酸镁，碱式碳酸镁
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℃发生二氧化碳，生成氧化镁。几乎不溶于水，但在水中引起轻微的碱性反应。不溶于乙醇，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乙烯袋；
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.

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