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Use:mainly used for the manufacturing of high requirement of rubber products or rubber chemicals.
Features:Small single particle size, larger than surface area, strong dispersion capacity, with strong activity .
| Item | Indicator | |||
| Model | Grade A | Grade B | Grade C | Grade D |
| Zinc oxide (ZnO)　                                 %≥ | 98 | 97 | 96 | 95 |
| Moisture                                                 %≤ | 0.7 | 0.7 | 0.7 | 0.7 |
| Water soluble                                         %≤ | 0.5 | 0.6 | 0.7 | 0.8 |
| Loss on ignition                                   %≤ | 1–3 | 1–4 | 1–4 | 1–4 |
| Hydrochloric acid insuluble substance                                               %≤ | 0.02 | 0.03 | 0.05 | 0.05 |
| Lead oxide(Pb)                                      %≤ | 0.01 | 0.01 | 0.05 | 0.05 |
| Manganese oxide（Mn）                    %≤ | 0.001 | 0.001 | 0.002 | 0.002 |
| Copper oxide(Cu)　                             %≤ | 0.001 | 0.001 | 0.002 | 0.002 |
| Fineness（45um Sieve residue ）  %≤ | 0.1 | 0.2 | 0.3 | 0.4 |
| Specific surface ㎡/g　                        %≤ | 45 | 45 | 35 | 35 |
| Accumulated density: g/m                   %≥ | 0.35 | 0.35 | 0.4 | 0.4 |