| Grade |
A |
B |
Appearance |
White Powder |
9-12 |
| Assay, as ZnO% (min.) |
99.8 |
99.6 |
Lead as Pb% (max.) |
0.002 |
0.05 |
| Cadmium as Cd% (max.) |
0.0005 |
0.001 |
Copper as Cu% (max.) |
0.0005 |
0.002 |
| Iron as Fe% (max.) |
0.001 |
0.005 |
Volatiles% on dry basis (max.) |
0.1 |
0.1 |
| Insoluble% in dil. HCl (max.) |
0.01 |
0.01 |
Oil Absorption% |
14-16 |
14-16 |
| Specific Gravity |
5.5 |
5.5 |
Surface Area (BET), m2/gr |
5 |
5 |
| Residue% on BS 325 mesh (max.) |
0.02 |
0.1 |
| These are the general specifications. However, material as per the specific requirement of customers can be offered. |
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