In chemistry, a superoxide is a compound that contains the superoxide ion, which has the chemical formula O − 2. The systematic name of the anion is dioxide(1−). The reactive oxygen ion superoxide is particularly important as the product of the one-electron reduction of dioxygen O 2, which occurs widely in nature.

superoxide. Molecular Formula O 2; Average mass 31.999 Da; Monoisotopic mass 31.990377 Da; ChemSpider ID 4514331

Potassium superoxide is an inorganic compound with the formula KO 2. It is a yellow paramagnetic solid that decomposes in moist air. It is a rare example of a stable salt of the superoxide anion. It is used as a CO 2 scrubber, H 2 O dehumidifier, and O 2 generator in rebreathers, spacecraft, submarines, and spacesuits.