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БАРИЙ окись
- английское имяBarium oxide
- CAS №1304-28-5
- CBNumberCB6391366
- ФормулаBaO
- мольный вес153.33
- EINECS215-127-9
- номер MDLMFCD00003453
- файл Mol1304-28-5.mol
Температура плавления | 1920 °C | ||||||||||||||
Температура кипения | 2000 °C | ||||||||||||||
плотность | 5.72 g/mL at 25 °C(lit.) | ||||||||||||||
показатель преломления | 1.98 | ||||||||||||||
растворимость | soluble in dilute acid solutions, ethanol; insoluble in acetone | ||||||||||||||
форма | Powder | ||||||||||||||
Удельный вес | 5.72 | ||||||||||||||
цвет | Light yellow-greenish to grayish | ||||||||||||||
Растворимость в воде | Sparingly soluble in water. Soluble in ethanol, dilute mineral acids and alkali. | ||||||||||||||
Чувствительный | Moisture Sensitive | ||||||||||||||
Кристальная структура | NaCl type | ||||||||||||||
crystal system | Cube | ||||||||||||||
Мерк | 14,986 | ||||||||||||||
Space group | Fm3m | ||||||||||||||
Lattice constant |
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Пределы воздействия | ACGIH: TWA 0.5 mg/m3 NIOSH: IDLH 50 mg/m3; TWA 0.5 mg/m3 |
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Стабильность | Stable. Incompatible with strong acids, water. Protect from moisture. | ||||||||||||||
Справочник по базе данных CAS | 1304-28-5(CAS DataBase Reference) | ||||||||||||||
Рейтинг продуктов питания EWG | 1 | ||||||||||||||
FDA UNII | 77603K202B | ||||||||||||||
Система регистрации веществ EPA | Barium oxide (1304-28-5) |
Коды опасности | T | |||||||||
Заявления о рисках | 20-25-34 | |||||||||
Заявления о безопасности | 26-36/37/39-45 | |||||||||
РИДАДР | UN 1884 6.1/PG 3 | |||||||||
WGK Германия | 1 | |||||||||
RTECS | CQ9800000 | |||||||||
F | 3-9-34 | |||||||||
TSCA | Yes | |||||||||
Класс опасности | 6.1 | |||||||||
Группа упаковки | III | |||||||||
кода HS | 28164000 | |||||||||
Токсичность | mouse,LD50,intraperitoneal,146mg/kg (146mg/kg),Current Toxicology. Vol. 1, Pg. 39, 1993. | |||||||||
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
H301:Токсично при проглатывании.
H314:При попадании на кожу и в глаза вызывает химические ожоги.
H332:Вредно при вдыхании.
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оператор предупредительных мер
P260:Не вдыхать газ/ пары/ пыль/ аэрозоли/ дым/ туман.
P280:Использовать перчатки/ средства защиты глаз/ лица.
P301+P310+P330:ПРИ ПРОГЛАТЫВАНИИ: Немедленно обратиться за медицинской помощью. Прополоскать рот.
P301+P330+P331:ПРИ ПРОГЛАТЫВАНИИ: Прополоскать рот. Не вызывать рвоту!
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.
БАРИЙ окись химические свойства, назначение, производство
Физические свойства
Barium Oxide is a white, hygroscopic formed by the burning of Ba metal in oxygen or the decomposition of the carbonate salt:2Ba+ O2→2BaO
BaCO3→BaO+ CO2
It transforms into the hydroxide on contact with water.
BaO+H2O→Ba(OH)2
It is soluble in ethanol, dilute acids and alkalis but insoluble in acetone and liquid ammonia.
The monoxide is formed when the metal burns in air, but is usually prepared by the ignition of the nitrate, oxygen and oxides of nitrogen being liberated. It can also be obtained by the ignition of an intimate mixture of the carbonate and carbon, and in small quantities by the ignition of the iodate.
Использование
Barium oxide is used as a coating for “hot cathodes” in a variety of electronic devices such as TV’s and lamps. It replaced lead oxide in the production of certain kinds of glass. While lead oxide raised the refractive index of the glass, it also raised the dispersion, i.e refraction of various colors of light resulting in distortion of images which barium oxide does not alter. Barium oxide also has use as an ethoxylation catalyst in the reaction of ethylene oxide and alcohols which takes place between 150 and 200°C.The thermionic emission from thin evaporated films of barium oxide has been studied extensively. Thin barium oxide films have a good emission following evaporation. The emission improves a little during heat treatment, and is then similar to that from a sprayed cathode coating of barium oxide.
Определение
barium oxide: A white or yellowishsolid, BaO, obtained by heating bariumin oxygen or by the thermal decompositionof barium carbonate ornitrate; cubic; r.d. 5.72; m.p. 1923°C;b.p. 2000°C. When barium oxide isheated in oxygen the peroxide, BaO2,is formed in a reversible reactionthat was once used as a method forobtaining oxygen (the Brin process).Barium oxide is now used in themanufacture of lubricating-oil additives.Подготовка
Barium oxide is made by heating barium carbonate with coke, carbon black or tar:
BaCO3 + C→ BaO + 2CO
It may be also prepared by thermal decomposition of barium nitrate.
Общее описание
A white to yellow powder. May be toxic by ingestion. Irritates skin, eyes and mucous membranes. Used as a drying agent for gasoline and solvents.Реакции воздуха и воды
Hygroscopic. Reacts readily and exothermically with water to form a solution of corrosive barium hydroxide [Merck 11th ed. 1989].Профиль реактивности
BARIUM OXIDE reacts as a strong base. Combines exothermically with all categories of acids. Reacts with carbon dioxide to form barium carbonate [Merck 11th ed. 1989]. Ignites hydroxylamine on contact [Mellor 8:291 1946-47]. Mixtures with mercurous or nickel oxide react vigorously with hydrogen sulfide in air. Explosions may result [Mellor 10:140 1946-47]. Can react, particularly in the presence of moisture, with aluminum and zinc)to form oxides or hydroxides of the metal and generate gaseous hydrogen. May initiate polymerization reactions in polymerizable organic compounds, especially epoxides. May generate flammable and/or toxic gases with ammonium salts, nitrides, halogenated organics, peroxides, and hydroperoxides.Опасность
Toxic by ingestion. See barium.Угроза здоровью
TOXIC; inhalation, ingestion or contact (skin, eyes) with vapors, dusts or substance may cause severe injury, burns or death. Reaction with water or moist air will release toxic, corrosive or flammable gases. Reaction with water may generate much heat that will increase the concentration of fumes in the air. Fire will produce irritating, corrosive and/or toxic gases. Runoff from fire control or dilution water may be corrosive and/or toxic and cause pollution.Пожароопасность
Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes. Vapors may accumulate in confined areas (basement, tanks, hopper/tank cars etc.). Substance will react with water (some violently), releasing corrosive and/or toxic gases and runoff. Contact with metals may evolve flammable hydrogen gas. Containers may explode when heated or if contaminated with water.Профиль безопасности
A poison via subcutaneous route. See also BARIUM COMPOUNDS (soluble). Combustible by spontaneous chemical reaction; produces heat on contact with water or steam. Reacts with H2O, Ba(OH)2. Incompatible with H2S, hydroxylamine, N2O4, triuranium octaoxide, so3.Возможный контакт
It is used to dry gases and solvents and in producing detergents for lubricating oils.Перевозки
UN1884 Barium oxide, Hazard Class: 6.1; Labels: 6.1—Poisonous materials.Несовместимости
Reacts with water, forming the strong base, barium hydroxide. Keep away from acids, hydrogen sulfide, carbon dioxide; hydroxylamine, nitrogen tetroxide; sulfur trioxide; since violent reactions occur. Reacts with triuranium. Never pour water into this chemical.БАРИЙ окись запасные части и сырье
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