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Personne àcontacter Ms. Ivy
Xiangjiaang, Tianjin, Tianjin
| Item | Premium grade | First grade | Regular grade |
| Zn %min | *5.*0 | *5.4 | *4.*1 |
| ZnSO4H2O % min | *8 | *7 | *5 |
| Insolubale matter % max | 0.**0 | 0.**0 | 0.**0 |
| PH Value (*0g/l) | 4.0 | 4.0 | |
| Cl % max | 0.*0 | 0.*0 | |
| Fe% max | 0.*1 | 0.*2 | 0.*6 |
| Pb% max | 0.**1 | 0.**7 | 0.**0 |
| Mn% max |
