Item

Index

First grade

Qualified product

Appearance

white powder

Zn, %

10.3 ~ 11.3

10.0 ~ 11.5

Free Fatty acid (as Stearic acid), % ≤

1.0

1.5

Loss on heat, % ≤

1.0

1.5

Melting point , °C

120 ± 5

120 ± 5

Fineness on 0.075mm test sieve, % ≥

99.5

95.0