... of Ag ,Al,Cd,Cu,Fe,Mg,Ni,Pb,Se and Sn is below 10ppm;c.Ultra purity Tellurium(Te 99 ... of Ag ,Al,Cd,Cu,Fe,Mg,Ni,Pb,Se and Sn is below 1ppm;d.Ultra High purity Tellurium(Te ... of Ag ,Al,Cd,Cu,Fe,Mg,Ni,Pb,Se and Sn is below 0.1ppm.Packing 2.5kg/bagApplication It ... II-vI compound semiconductor,thermoelectric converting element,refrigerating element,piezocrystal and infrared detector ect.