Molecular formula:ZnCO3·2Zn（OH）2·H2O
Molecular weight:342.14
Properties：This product is white powder, The chemical composition of basic zinc carbonate. insoluble in water or alcohol, soluble in acids with liberating carbon dioxide and soluble in alkalies.
Uses:It is used in rubber goods(emulsion), medicine, cosmetics etc. And it is also used as raw materials for catalyst and desulfurizing agents. It has batter desulfurizing rate.
|
Item
|
Index/%
|
|
High-class products
|
First-rate product
|
Qualified product
|
| Basic zinc carbonate（as Zn）（as dry material） W/ ≥ |
57.5
|
57.0
|
56.5
|
| Loss on lgnition W/ |
25.0-28.0
|
25.0-30.0
|
24.0-32.0
|
| Heavy metal (calculated as Pb) ≤ |
0.03
|
0.05
|
0.05
|
| Moisture ≤ |
2.5
|
3.5
|
5.0
|
| Sulfate (SO4) W/ ≤ |
0.6
|
0.8
|
—
|
| Pass through 75μm siev（as dry material） ≥ |
95.0
|
94.0
|
93.0
|
| Cadmium (Cd) W/ ≤ |
0.02
|
0.05
|
—
|
