Caesium superoxide is a chemical compound with the chemical formula . It consists of caesium cations and superoxide anions . It is an orange solid.
Caesium superoxide's crystal structure is same as calcium carbide. It contains direct oxygen-oxygen bonding.
Burning caesium in excess oxygen will produce caesium superoxide.
Caesium superoxide reacts with water to form hydrogen peroxide and caesium hydroxide.
Heating to approximately 400 ðC induces thermal decomposition to caesium peroxide.
It reacts with ozone to form caesium ozonide.