laed (Pb) +99.999% Lead (Pb)1, Physical character:Atomic Weight: 207.2Density: ρ=11. ... mp: 327.5°CBoiling Point: bp: 1751°C2, Specification:High Purity Leads:Pb-05 Grade 99.999. The content of Leads ... Mg, Ni, Sb, & Sn is bellow 1 ppm;Uitra High Purity Leads:Pb-07 Grade 99.9999. The content of Leads ... Zn is bellow 0.1 ppm;3, Physical Size:Virgulate, Ingots.4, Usage:It is mainly used in the manufacture of ...