Category and code

Items

Wonderful grade

First grade

Content (ZnO dry) %

99.7 min

99.5 min

PbO %

0.037 max

0.05 max

Manganeseoxide compound %

0.0001 max

0.0001

CuO %

0.0002 max

0.0004 max

Insoluble in HCl %

0.006 max

0.008 max

ignition loss %

0.2 max

0.2 max

Water solubles %

0.1 Max

0.15 max

45um Residue on sieve  %

0.1 Max

0.15 max

Volatiles(105^oC) %

0.3 Max

0.4 max

FeO %

0.0009 Max

0.0014 max

Cd %

0.0009 Max

0.0015 max

Total sulfur content %

0.003 max

0.001 max