Project

standard

Content (in terms of Zn)    %

≥19

Transmittance               %

≥95

Specific rotation[α]D20

+16.50—+19.50

Chloride                    %

≤0.02

Sulfate                     %

≤0.05

Arsenic salt

≤0.0005

Heavy metal                 %

≤0.001

Iron salt

≤20

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