... Ag ,Al,Cd,Cu,Fe,Mg,Ni,Pb,Se and Sn is below 10ppm;c.Ultra purity Tellurium(Te ... Ag ,Al,Cd,Cu,Fe,Mg,Ni,Pb,Se and Sn is below 1ppm;d.Ultra High purity Tellurium( ... Ag ,Al,Cd,Cu,Fe,Mg,Ni,Pb,Se and Sn is below 0.1ppm.Packing:2.5kg/bagApplication: ... -VI compound semiconductor,thermoelectric converting element,refrigerating element,piezocrystal and infrared detector ect.Contact:Richard Castletrade at zgmy.net+86 ...