Second, molecular weight: 342.23

Third, the physical and chemical properties: White fine amorphous powder. Odorless and tasteless. The relative density of 4.42-4.45 insoluble in water and alcohol, making soluble ammonia, can dissolve in acid and sodium hydride in the role with 30% hydrogen peroxide, releasing carbon dioxide, the formation of peroxides.

Four purposes: as a mild astringent, such as rubber or cable fill gentry agent, activator (natural rubber), colorants white rubber filling agent, natural rubber and chloroprene rubber curing agent, also be used as polyolefin PVC and other plastics and light stabilizers.

Fifth, the main content: (in total Zn, dry Kiki),% ≥ 57

Moisture ≤ 2.5%

Fineness of 200 mesh screenings ≥ 6%

Heavy metal (Pb) ≤ 0.04

Sulfate (SO42 dollars)% 0.60

25.0-28.0% loss on ignition

Cadmium (cd)% 0.10