Lead(II,IV) oxide, also known as lead tetroxide, minium, red lead, or triplumbic tetroxide, is a chemical compound. It contains some lead atoms in the +2 oxidation state and some in the +4 oxidation state. It is used in batteries, paints, and glass. It dissolves in acids. It is made by heating lead(II) oxide in air. It is toxic because it contains lead.