grade

-

72%Zn

68%Zn

zinc

≥%

72

68

plumbum

≤PPM

5（0.0005%）

500

cadmium

≤PPM

2 (0.0002%)

200

arsenic

≤PPM

2(0.0002%)

250

metal zinc

-

no

no

100mesh residue on sieve

≤%

0.1

0.1

bulk specific weight

≥g/cm3

0.35

0.35