Kaliumsuperoxid

Bezeichnung:Kaliumsuperoxid

CAS-Nr12030-88-5

Englisch Name:Potassium superoxide

CBNumberCB7247558

SummenformelKO2*

Molgewicht71.1

MOL-Datei12030-88-5.mol

Synonyma

Kaliumsuperoxid

Kaliumsuperoxid physikalisch-chemischer Eigenschaften

Schmelzpunkt	400 °C
Dichte	2,14 g/cm³
storage temp.	Store at +15°C to +25°C.
Löslichkeit	Soluble in ethanol and ether.
Aggregatzustand	powder
Farbe	Yellow-green
Wichte	2.14
PH	>7 (H2O, 20℃)
Wasserlöslichkeit	reacts
Sensitive	Air & Moisture Sensitive
Stabilität	Stable, but reacts violently with water. Incompatible with moisture, alcohols, strong reducing agents, strong acids, finely powdered metals.
CAS Datenbank	12030-88-5(CAS DataBase Reference)
NIST chemische Informationen	Potassium superoxide(12030-88-5)
EPA chemische Informationen	Potassium superoxide (K(O2)) (12030-88-5)

Sicherheit

Kennzeichnung gefährlicher	O,C
R-Sätze:	8-14-34-35
S-Sätze:	17-27-36/37/39-8-45-26
RIDADR	UN 2466 5.1/PG 1
WGK Germany	3
RTECS-Nr.	TT6053000
TSCA	Yes
HazardClass	5.1
PackingGroup	I
HS Code	28259080

Gefahreninformationscode (GHS)

Potassium superoxide Chemische Eigenschaften,Einsatz,Produktion Methoden

R-Sätze Betriebsanweisung:
R8:Feuergefahr bei Berührung mit brennbaren Stoffen.
R14:Reagiert heftig mit Wasser.
R34:Verursacht Verätzungen.
R35:Verursacht schwere Verätzungen.
S-Sätze Betriebsanweisung:
S17:Von brennbaren Stoffen fernhalten.
S27:Beschmutzte, getränkte Kleidung sofort ausziehen.
S36/37/39:Bei der Arbeit geeignete Schutzkleidung,Schutzhandschuhe und Schutzbrille/Gesichtsschutz tragen.
S8:Behälter trocken halten.
S45:Bei Unfall oder Unwohlsein sofort Arzt zuziehen (wenn möglich, dieses Etikett vorzeigen).
S26:Bei Berührung mit den Augen sofort gründlich mit Wasser abspülen und Arzt konsultieren.
Chemische Eigenschaften
light yellow powder or chunks
Verwenden
Potassium oxide is used as a carbon dioxide scrubber, water dehumidifier and oxygen generator. It finds application in rebreathers for fighting with fire and mine rescue work. It is also used in spacecraft, submarines and spacesuit life support systems.
Verwenden
Reagent and intermediate.
One use of potassium superoxide,KO2, is for generating oxygen. It has the ability to absorb carbon dioxide, while giving out oxygen at the same time:
4KO2(s)+ 2CO2(g)--->2K2CO3(s)+ 3O2(g)
This property has been made use of in breathing equipment,e.g.for mountaineers, in submarines and in spacecraft.
Allgemeine Beschreibung
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 Reaktionen
Reacts explosively with water [Mellor 2, Supp. 3: 1631. 1963].
Reaktivität anzeigen
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].
Hazard
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.
Brandgefahr
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.
Sicherheitsprofil
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.

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