Packed in polyethylene bottle with sealed plastic bag out sideTellurium Oxide 4N 99. 99% , 5N 99. 999% 1. Purity 99. 99% Cu/ Fe/ Al/ As/ Si/ Mg 10ppm each, Pb/ Se 20ppm each2. Purity 99. 999% minCu/ Al/ Pb/ Fe/ Ni/ Si 0. 5ppm max each, Mg/ Ca/ Cd 1. 0ppm max eachPacked in polyethylene bottle with sealed plastic bag out side