1. Molecular formula: 2Zn(OH)2.ZnCO3.H2O
2. Molecular weight: 342.23
3. Appearance: White powder
4. Packaging: PE lined plastic woven bag. Net weight 25Kg.
5. Use: used as light constringency & latex products, or used in the preparation of calamine to protect the skin. In manufacturing rayon, fertilizer, rubber, coating, calamine; as desulfurizing agent;as astringent. It also can be used in rubber product, paint, medicine & chemicals.
Item |
Index value |
Industrial standard |
The standard value of our company |
Top-grade |
First grade |
Main assay ( Zn ), % ≥ |
57.5 |
57.0 |
58.0 |
Loss on ignition , % ≤ |
25-28 |
25-30 |
25-28 |
Heavy metals ( Pb ), % ≤ |
0.04 |
0.05 |
0.003 |
Moisture, % ≤ |
2.5 |
3.5 |
2.5 |
Sulfate, % ≤ |
0.60 |
0.80 |
0.60 |
Fineness (Passed on 75um screen ), % ≥
Cd , % ≤ |
95.0 |
94.0 |
99.95 |
0.10 |
- |
0.0001 |
|
