https://www.wsdty.com/product/copper-oxide/

Element Standard% Concentration%

Content % ≧97 97.06
Lead(Pb)% ≦0.0005 0.0003
Acid insoluble% ≦ 0.003 0.0013
Fe % ≦0.003 0.0004
Nickel (Ni)% ≦0.001 0.0004
Chlorine(cl)% ≦0.0015 0.0007
Zinc(Zn)% ≦0.003 0.0005