Lead dioxide, PbO₂, also plumbic oxide, lead peroxide, is an oxide of lead, with lead in oxidation state +4.

When hydrated, it may be called plumbic acid.

Lead dioxide is amphoteric.

Lead dioxide can dissolve in strong base to form plumbate ion, Pb(OH)₆^2-. This can then form plumbate compounds.

In acid conditions, it is typically reduced to lead(II) ion, Pb²⁺; lead(IV) ion, Pb⁴⁺, is not found in aqueous solution.

Lead dioxide is a somewhat strong oxidizer. With many things, it can produce lead(II) ion, Pb²⁺, or plumbous hydroxide, Pb(OH)₂.

Lead dioxide is a good electrical conductor. The reason for this, recently proposed, is due to a lack of oxygen ions leaving the oxide charged. This results in PbO₂ being metallic.

External links

• National Pollutant Inventory - Lead and Lead Compounds Fact Sheet

Oxides | Lead compounds

Oxid olovičitý | 二酸化鉛 | 二氧化鉛