Пероксид лития
- английское имяLithium peroxide
- CAS №12031-80-0
- CBNumberCB0852920
- ФормулаLi2O2
- мольный вес45.88
- EINECS234-758-0
- номер MDLMFCD00016184
- файл Mol12031-80-0.mol
химическое свойство
| Температура плавления | 340°C (dec.) |
| плотность | 2.310 |
| растворимость | Soluble in anhydrous acetic acid. Insoluble in alcohol. |
| форма | Powder |
| цвет | White to pale yellow |
| Растворимость в воде | solubility in H2O is 8% (20°C); solubility in acetic acid is 5.6% (20°C); insoluble absolute alcohol (20°C) [HAW93] |
| Чувствительный | Air & Moisture Sensitive |
| Справочник по базе данных CAS | 12031-80-0(CAS DataBase Reference) |
| FDA UNII | 9ANX556R5F |
| Система регистрации веществ EPA | Lithium peroxide (Li2(O2)) (12031-80-0) |
| UNSPSC Code | 12352303 |
| NACRES | NA.23 |
| Коды опасности | O,C | |||||||||
| Заявления о рисках | 8-35 | |||||||||
| Заявления о безопасности | 8-26-27-28-36/37/39-45 | |||||||||
| РИДАДР | UN 1472 5.1/PG 2 | |||||||||
| WGK Германия | 3 | |||||||||
| F | 3-10-23 | |||||||||
| TSCA | Yes | |||||||||
| Класс опасности | 5.1 | |||||||||
| Группа упаковки | II | |||||||||
| кода HS | 28259085 | |||||||||
| Банк данных об опасных веществах | 12031-80-0(Hazardous Substances Data) | |||||||||
| NFPA 704: |
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рисовальное письмо(GHS)
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рисовальное письмо(GHS)
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сигнальный язык
опасность
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вредная бумага
H314：При попадании на кожу и в глаза вызывает химические ожоги.
H272：Окислитель; может усилить возгорание.
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оператор предупредительных мер
P210：Беречь от тепла, горячих поверхностей, искр, открытого огня и других источников воспламенения. Не курить.
P260：Не вдыхать газ/ пары/ пыль/ аэрозоли/ дым/ туман.
P280：Использовать перчатки/ средства защиты глаз/ лица.
P303+P361+P353：ПРИ ПОПАДАНИИ НА КОЖУ (или волосы): Снять/удалить немедленно всю загрязненную одежду. Промыть кожу водой.
P305+P351+P338+P310：ПРИ ПОПАДАНИИ В ГЛАЗА: Осторожно промыть глаза водой в течение нескольких минут. Снять контактные линзы, если Вы ими пользуетесь и если это легко сделать. Продолжить промывание глаз. Немедленно обратиться за медицинской помощью.
Пероксид лития химические свойства, назначение, производство
Химические свойства
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.
Использование
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.Подготовка
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
Общее описание
A white powder or sandy yellow granular solid. Irritates skin, eyes and mucous membranes. Used to produce a supply of high-purity oxygen.Реакции воздуха и воды
Contact with water or moist air generates a large amount of heat and corrosive, alkaline lithium hydroxide [AAR 1991].Профиль реактивности
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.Угроза здоровью
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.Пожароопасность
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.Профиль безопасности
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.