... 51°CSpecificationsa.High purity Tellurium(Te 99.99%)Impurities(%) Cu 0.0035 Pb 0.0004 Al 0.0003 Bi 0.0004 Si 0.006 ... S 0.001 Se 0.0018 As 0.0005 Mg 0.0005 b.High purity ... content of Ag ,Al,Cd,Cu,Fe,Mg,Ni,Pb,Se and Sn is below 1ppm;d.Ultra High purity Tellurium(Te 99. ... 99999%)The total content of Ag ,Al,Cd,Cu,Fe,Mg,Ni ...