Pure selenium powder:1. Shape: ingot, granule2. Purity Level: 4N-7N3. Analysis method: ICP-MS or GDMS4. Vacuum packing Pure selenium powder (Se) selenium 99.99% Atomic Weight 78.96 Density p=4.79 g cm Melting Point 221C Boiling Point 685C Purity level 99.99% 99.99999% impurity Below 10 Show More...