Potassium peroxide

Potassium peroxide
IUPAC name Potassium peroxide
Identifiers
CAS number	17014-71-0 Y
PubChem	28202
	EC number	241-089-8
Jmol-3D images	{{#if:[O-][O-].[K+].[K+]|Image 1
SMILES [O-][O-].[K+].[K+]
InChI InChI=1S/2K.O2/c;;1-2/q2*+1;-2
Properties
Molecular formula	K2O2
Molar mass	110.196 g/mol
Appearance	yellow amorphous solid
Melting point	490 °C
Solubility in water	reacts with water[1]
Structure
Crystal structure	Orthorombic
Space group	Cmca, oS16
Thermochemistry
Std enthalpy of formation ΔfHo298	−496 kJ·mol−1[2]
Standard molar entropy So298	113 J·mol−1·K−1[2]
Hazards
NFPA 704	0 3 1 OX
Related compounds
Other anions	Potassium oxide Potassium superoxide Potassium chloride
Other cations	Lithium peroxide Sodium peroxide
Y (verify) (what is: Y/N?) Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
Infobox references

Potassium peroxide is an inorganic compound with the molecular formula K₂O₂. It is formed as Potassium reacts with oxygen in the air, along with potassium oxide (K₂O) and potassium superoxide (KO₂).

Potassium peroxide reacts with water to form potassium hydroxide and oxygen:

2 K₂O₂ + 2 H₂O → 4 KOH + O₂

References