high purity bismuth trioxidebi2o3-05 grade 99. 999. The content of bismuth trioxideis above 99. 999%. The total content of ag,al,ca,cr, cu,fe,mg,mn,ni and pb is below 10ppm.
ultra purity telluriumte-06 grade 99. 9999. The content of tellurium is above 99. 9999%. The total content of ag,al,cd,cu,fe,mg,ni, pb,se and zn is below 1ppm.