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Zinc (Zn) 1, Physical character: Atomic Weight: 65.67 Electronegative: 1.49-1.66 Density: ρ=7.140 g/cm3 Melting Point: mp: 419.5 °C Boiling Point: bp: 908 °C 2, Specification: High Purity Zinc: Zn-05 Grade 99.999. The content of Zinc is above 99.999%. The total content of Ag, Al, Cd, As, Co, Cu, Fe, In, Mg, Ni, Pb & Sn is bellow 10 ppm; Uitra Purity Zinc: Zn-06 Grade 99.9999. The content of Zinc is above 99.9999%. The total content of Ag, Al, Cd, As, Co, Cu, Fe, In, Pb & Sn is bellow 1 ppm. 3, Physical Size: Virgulate, Ingot, Powder. 4, Usage: It is mainly used in the manufacture of compound semiconductors, reductant, alloys and precision cating in automobile industry etc. 5, Packing: It is packed with dacron film, then covered with a sealed plastic film bag.