含量
Assay

 ≥99%

氯化物(Cl)
Chloride

≤0.003%

铁(Fe)
Ferric

≤0.001%

铜(Cu)
Copper

≤0.0003%

锌(Zn)
Zinc

≤0.001%

铅(Pb)
Lead

≤0.001%

钴(Co)
Cobalt

≤0.003%