Zinc sulfate Heptahydrate for paint,printing ink,rubber,cable,medicines,electronics,papermaking,enamel,match,cosmetic and others

Zinc sulfate Heptahydrate

Specification:

                                  superior quality             fist grade                 qualify grade

Zn content≥%                  22.0                            21.0                         20.0

free acid content≤%          0.1                              0.2                           0.3

Pb content≤%                 0.002                          0.005                         0.01

Cd content≤%                 0.002                          0.002                        0.003

As content≤%                 0.002                          0.005                        0.007

Zinc sulfate Heptahydrate