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Potassium superoxide

Potassium superoxide
Potassium superoxide structure
Chemical Name:
Potassium superoxide
K(O2);burntpotash;cacinedpotash;Kaliumperoxid;POTASSIUM OXIDE;POTASSIUM DIOXIDE;dipotassium peroxide;potassium hyperoxide;POTASSIUM SUPEROXIDE;Potassium oxide super
Molecular Formula:
KO2 *
Formula Weight:
MOL File:

Potassium superoxide Properties

Melting point:
400 °C
2,14 g/cm3
storage temp. 
Store at +15°C to +25°C.
Soluble in ethanol and ether.
Specific Gravity
>7 (H2O, 20℃)
Water Solubility 
Air & Moisture Sensitive
Stable, but reacts violently with water. Incompatible with moisture, alcohols, strong reducing agents, strong acids, finely powdered metals.
CAS DataBase Reference
12030-88-5(CAS DataBase Reference)
NIST Chemistry Reference
Potassium superoxide(12030-88-5)
  • Risk and Safety Statements
Signal word  Danger
Hazard statements  H318-H271-H314
Precautionary statements  P221-P283-P303+P361+P353-P405-P501a-P220-P280-P305+P351+P338-P310
Hazard Codes  O,C
Risk Statements  8-14-34-35
Safety Statements  17-27-36/37/39-8-45-26
RIDADR  UN 2466 5.1/PG 1
WGK Germany  3
RTECS  TT6053000
HazardClass  5.1
PackingGroup  I
HS Code  28259080

Potassium superoxide price More Price(7)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich 278904 Potassium dioxide powder 12030-88-5 50g $48.4 2018-11-13 Buy
Sigma-Aldrich 278904 Potassium dioxide powder 12030-88-5 250g $155 2018-11-13 Buy
Strem Chemicals 93-1970 Potassium superoxide, min. 96% 12030-88-5 25g $22 2018-11-13 Buy
Strem Chemicals 93-1970 Potassium superoxide, min. 96% 12030-88-5 100g $58 2018-11-13 Buy
Sigma-Aldrich 8.14151 Potassium superoxide for synthesis. CAS 12030-88-5, pH >7 (H O, 20 °C)., for synthesis 12030-88-5 8141510050 $110 2018-11-23 Buy

Potassium superoxide Chemical Properties,Uses,Production

Chemical Properties

light yellow powder or chunks


Reagent and intermediate.

General Description

A yellowish to white solid. Melting point 948°F. Mixtures with combustible material readily ignite by friction, heat, or contact with moisture. Prolonged exposure to fire or heat may cause vigorous decomposition of the material and rupturing of the container.

Air & Water Reactions

Reacts explosively with water [Mellor 2, Supp. 3: 1631. 1963].

Reactivity Profile

Potassium superoxide is a powerful oxidizer. Forms on the surface of potassium metal, solid or molten, that is exposed to the air. Attempts to extinguish burning potassium with powdered graphite has resulted in violent explosions [Chem. Abstr. 63:424. 1965]. Highly oxidized potassium metal was dropped into a dish of ethyl alcohol, an immediate explosion shattered the dish. Potassium superoxide was considered the cause of the reaction [Health and Safety Inf. 251. 1967]. Potassium superoxide should not be added to pure organic materials (hydrocarbons), as ignition and violent explosion may occur. Oxidation of arsenic, antimony, copper, potassium, tin, or zinc proceeds with incandescence, [Mellor, 1941, Vol. 2, 493]. Interaction between the superoxide and diselenium dichloride is violent, [Mellor, 1947, Vol. 10, 897].


Corrosive to tissue.

Health Hazard

TOXIC; inhalation, ingestion or contact (skin, eyes) with vapors, dusts or substance may cause severe injury, burns or death. Fire may produce irritating and/or toxic gases. Toxic fumes or dust may accumulate in confined areas (basement, tanks, hopper/tank cars, etc.). Runoff from fire control or dilution water may cause pollution.

Fire Hazard

May explode from friction, heat or contamination. These substances will accelerate burning when involved in a fire. May ignite combustibles (wood, paper, oil, clothing, etc.). Some will react explosively with hydrocarbons (fuels). Containers may explode when heated. Runoff may create fire or explosion hazard.

Safety Profile

Explosive reaction when heated with carbon, 2-aminophenol + tetrahydrofuran (at 65°C). Forms a friction- sensitive explosive mixture with hydrocarbons. Violent reaction with lselenium dichloride, ethanol, potassium- sodium alloy. May ignite on contact with organic compounds. Incandescent reaction with metals (e.g., arsenic, antimony, copper, potassium, tin, and zinc). When heated to decomposition it emits toxic fumes of K2O. See also PEROXIDES.

Potassium superoxide Preparation Products And Raw materials

Raw materials

Preparation Products

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