Magnesium carbonate

White amorphous fine powder

Non-toxic, tasteless, stable in the air. It is slightly   soluble in water and easily soluble in acid and ammonium salt solutions.

Food and   pharmaceutical additives; daily cosmetics; fine chemical industry; electronic   glass, electronic ceramics industry; rubber industry, etc.

1

Descriptipon性状

White   powder           

 白色粉末

Complies

2

Identification鉴别

Positivetest for   Magnesium               呈镁盐的鉴别反应

Complies

3

Assay(MgO)含量

40.0%--43.5.5%

42.0%

4

Acid-insoluble   substances     酸不溶物

≤0.05%

0.03%

5

Solulbe substances          可溶性盐

≤1.0%

0.5%

6

Heavy Metal重金属

≤30ppm

<10ppm

7

Arsenic砷

≤4ppm

ND

8

Lead铅

≤1ppm

<1ppm

9

Calcium Oxide氧化钙

≤0.45%

0.10%

10

Iron铁

≤200ppm

50

11

Density堆积密度

0.22g/ml

12

Particle size(200目)

≥98%

100%

13

Toatl Aerobic Plate Count         菌落总数

＜1000cfu/g

Complies

14

Escherichia coli                大肠杆菌

＜3.0MPN/g

ND

Conclrsion

The above product   conforms to GB-25587-2010, USP41.