Toxicology
See also: Plutonium#ToxicityPlutonium oxide is highly toxic to humans, especially via inhalation. As with all plutonium compounds, it is subject to control under the Nuclear Non-Proliferation Treaty. Due to the radioactive alpha decay of plutonium, all of its compounds, PuO2 included, as well as plutonium metal, are warm to the touch.
Read more about this topic: Plutonium(IV) Oxide