Dilithiumperoxid

Bezeichnung:Dilithiumperoxid

CAS-Nr12031-80-0

Englisch Name:Lithium peroxide

CBNumberCB0852920

SummenformelLi2O2

Molgewicht45.88

MOL-Datei12031-80-0.mol

Synonyma

Dilithiumperoxid

Dilithiumperoxid physikalisch-chemischer Eigenschaften

Schmelzpunkt	340°C (dec.)
Dichte	2.310
Löslichkeit	Soluble in anhydrous acetic acid. Insoluble in alcohol.
Aggregatzustand	Powder
Farbe	White to pale yellow
Wasserlöslichkeit	solubility in H2O is 8% (20°C); solubility in acetic acid is 5.6% (20°C); insoluble absolute alcohol (20°C) [HAW93]
Sensitive	Air & Moisture Sensitive
CAS Datenbank	12031-80-0(CAS DataBase Reference)
EPA chemische Informationen	Lithium peroxide (Li2(O2)) (12031-80-0)

Sicherheit

Kennzeichnung gefährlicher	O,C
R-Sätze:	8-35
S-Sätze:	8-26-27-28-36/37/39-45
RIDADR	UN 1472 5.1/PG 2
WGK Germany	3
F	3-10-23
TSCA	Yes
HazardClass	5.1
PackingGroup	II
HS Code	28259085
Giftige Stoffe Daten	12031-80-0(Hazardous Substances Data)

Gefahreninformationscode (GHS)

Lithium peroxide Chemische Eigenschaften,Einsatz,Produktion Methoden

R-Sätze Betriebsanweisung:
R8:Feuergefahr bei Berührung mit brennbaren Stoffen.
R35:Verursacht schwere Verätzungen.
S-Sätze Betriebsanweisung:
S8:Behälter trocken halten.
S26:Bei Berührung mit den Augen sofort gründlich mit Wasser abspülen und Arzt konsultieren.
S27:Beschmutzte, getränkte Kleidung sofort ausziehen.
S28:Bei Berührung mit der Haut sofort abwaschen mit viel . . . (vom Hersteller anzugeben).
S36/37/39:Bei der Arbeit geeignete Schutzkleidung,Schutzhandschuhe und Schutzbrille/Gesichtsschutz tragen.
S45:Bei Unfall oder Unwohlsein sofort Arzt zuziehen (wenn möglich, dieses Etikett vorzeigen).
Chemische Eigenschaften
Lithium peroxide is a white crystalline solid or pale yellow powder which is thermodynamically stable at room temperature. The substance decomposes on heating to 195°C (the exact decomposition temperature is subject to dispute) with the formation of lithium oxide and oxygen. The decomposition forms the basis for one preparation of lithium oxide. High-purity lithium peroxide may be stored for long periods of time with no significant decomposition.
The reaction of carbon dioxide and lithium peroxide is noted above. When lithium peroxide is exposed to the air, lithium carbonate is the final product. Dissolving pure lithium peroxide in water produces an alkaline solution containing lithium ions and hydroperoxide ions. The decomposition of the solution is typical in that oxygen is released on heating or in the presence of a catalyst. The water solubility of lithium peroxide decreases with increasing temperature.
Chemische Eigenschaften
Lithium peroxide, Li2O2, Mr 45.9, 2.36 g/cm3, has an active oxygen content of 34.8%, which is the highest of all metal peroxides. Lithium peroxide is pale yellow solid, stable at ambient temperature, and not hygroscopic. On heating to about 300 °C, it loses oxygen and forms lithium monoxide.
Verwenden
Lithium peroxide is used in air purifiers. It is also used to produce high-purity oxygen. It acts as a catalyst for polymerization of styrene to polystyrene. Further, it serves as a curing agent for special polymers and a source of oxygen in sealed spaces such as submarines and in breathing apparatus.
Verwenden
At this time no important industrial uses of lithium peroxide are known. One interesting potential application is in the field of atmosphere regeneration for undersea and space applications, since the compound reacts with carbon dioxide to release oxygen: Li2O2+C02 -> Li2CO3 + 0.5O2.
synthetische
Lithium peroxide is prepared industrially by the reaction of lithium hydroxide monohydrate with hydrogen peroxide which yields lithium hydroperoxide monohydrate.
LiOH·H20 + H202 → LiOOH·H20+H20
The hydroperoxide may be dehydrated by heating in a vacuum to yield the peroxide.
2LiOOH·H20 → Li202+H202 + 2H20
Allgemeine Beschreibung
A white powder or sandy yellow granular solid. Irritates skin, eyes and mucous membranes. Used to produce a supply of high-purity oxygen.
Air & Water Reaktionen
Contact with water or moist air generates a large amount of heat and corrosive, alkaline lithium hydroxide [AAR 1991].
Reaktivität anzeigen
Lithium peroxide is strongly basic and an extremely powerful oxidizing agent. Accelerates the combustion of other materials, especially organic materials, involved in a fire. Can ignite wood, paper, oil, clothing, etc. on contact. May react explosively with hydrocarbons (fuels). Exposure to heat in a closed container may result in a vigorous reaction that violently ruptures the container.
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.
Flammability and Explosibility
Not classified
Sicherheitsprofil
A powerful oxidizer and irritant to skin, eyes, and mucous membranes. A very dangerous fire hazard because it is an extremely powerful oxidizing agent. Will react with water or steam to produce heat; on contact with reducing materials, can react vigorously. See also LITHIUM COMPOUNDS, PEROXIDES, and PEROXIDES, INORGANIC.

Lithium peroxide Upstream-Materialien And Downstream Produkte

12031-80-0, Lithium peroxide Verwandte Suche:

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