Antimony Ingot 99.65%, 99.85%, 99.9% Antimony is a kind of colored heavy metal, crisp and shiny silver-white solid. Poor thermal conductivity. In room temperature, it can not be oxidated by oxygen in the air. There are three kind of purities: 99.65, 99.85, 99.9. Each ingot weighs about 25kg. It is packed with pallets.