Protactinium(IV) oxide

Protactinium(IV) oxide is a chemical compound with the formula PaO2.

The black oxide is formed by reducing Pa2O5 with hydrogen at 1 550 °C.

Protactinium(IV) oxide does not dissolve in H2SO4, HNO3, or HCl solutions, but reacts with HF.

[2][3]: 195 As protactinium(IV) oxide, like other protactinium compounds, is radioactive, toxic and very rare, it has no known technological use.

This inorganic compound–related article is a stub.

NFPA 704 four-colored diamond Health 4: Very short exposure could cause death or major residual injury. E.g. VX gas Flammability (red): no hazard code Instability (yellow): no hazard code Special hazard RA: Radioactive. E.g. plutonium