Натрий гидрид
- английское имяSodium hydride
- CAS №7646-69-7
- CBNumberCB1111738
- ФормулаHNa
- мольный вес24
- EINECS231-587-3
- номер MDLMFCD00003471
- файл Mol7646-69-7.mol
химическое свойство
| Температура плавления | 800 °C (dec.) (lit.) |
| плотность | 1.2 |
| Fp | 185°C |
| температура хранения | Store below +30°C. |
| растворимость | Soluble in molten sodium. Insoluble in ammonia, benzene,carbon tetrachloride, carbon disulfide and all organic solvents. |
| форма | powder (moistened with oil) |
| цвет | White to pale gray |
| Растворимость в воде | REACTS |
| Чувствительный | Air & Moisture Sensitive |
| Мерк | 14,8625 |
| Пределы воздействия | ACGIH: TWA 5 mg/m3 OSHA: TWA 5 mg/m3 NIOSH: IDLH 2500 mg/m3; TWA 5 mg/m3; STEL 10 mg/m3 |
| Справочник по базе данных CAS | 7646-69-7(CAS DataBase Reference) |
| Рейтинг продуктов питания EWG | 1 |
| FDA UNII | 23J3BHR95O |
| Справочник по химии NIST | Sodium hydride(7646-69-7) |
| Система регистрации веществ EPA | Sodium hydride (NaH) (7646-69-7) |
| Коды опасности | F,C | |||||||||
| Заявления о рисках | 15-36-35-11 | |||||||||
| Заявления о безопасности | 26-43-7/8-43A-24/25-7-60-22-45-37/39-16 | |||||||||
| РИДАДР | UN 1427 4.3/PG 1 | |||||||||
| WGK Германия | 3 | |||||||||
| RTECS | WB3910000 | |||||||||
| F | 10-21 | |||||||||
| TSCA | Yes | |||||||||
| Класс опасности | 4.3 | |||||||||
| Группа упаковки | I | |||||||||
| кода HS | 28500090 | |||||||||
| Банк данных об опасных веществах | 7646-69-7(Hazardous Substances Data) | |||||||||
| NFPA 704: |
|
рисовальное письмо(GHS)
-
рисовальное письмо(GHS)
-
сигнальный язык
опасность
-
вредная бумага
H314：При попадании на кожу и в глаза вызывает химические ожоги.
H228：Воспламеняющееся твердое вещество.
H260：При контакте с водой выделяет воспламеняющиеся газы, способные к спонтанному возгоранию.
H290：Может вызывать коррозию металлов.
-
оператор предупредительных мер
P210：Беречь от тепла, горячих поверхностей, искр, открытого огня и других источников воспламенения. Не курить.
P231+P232：Обращаться с продуктом и хранить его в атмосфере инертного газа . Беречь от влаги.
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：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.
Натрий гидрид химические свойства, назначение, производство
Описание
Sodium hydride, is a binary salt that has a specific hazard of releasing hydrogen upon contact with water. It is an odorless powder that is violently water reactive. The four-digit UN identification number is 1427. The NFPA 704 designation is health 3, flammability 3, and reactivity 2. The white space at the bottom of the diamond has a W with a slash through it, indicating water reactivity.Химические свойства
Grey solid. Pure sodium hydride forms colorless cubic crystals; however, the commercial product contains traces of sodium metal, giving it a light gray color. At atmospheric pressure, sodium hydride slowly evolves hydrogen above 300 ℃. At 420 ℃ decomposition is rapid but melting does not take place. Sodium hydride is a salt and therefore insoluble in inert organic solvents. It dissolves in molten sodium hydroxide, in sodium – potassium alloys and in molten LiCl – KCl eutectic mixtures (352 ℃). Sodium hydride is stable in dry air but ignites above 230 ℃, burning to form sodium oxide. It is hydrolyzed rapidly in moist air and as a dry powder it is spontaneously flammable. Sodium hydride reacts extremely violently with water, the heat of hydrolysis being sufficient to ignite the liberated hydrogen. It reacts with carbon dioxide to form sodium formate.Физические свойства
Silvery needles; refractive index 1.470; density 0.92 g/cm3; decomposes at 800°C; decomposes explosively in water; reacts violently with lower alcohols; dissolves in molten sodium and molten sodium hydroxide; insoluble in liquid ammonia, benzene, carbon tetrachloride and carbon disulfide. Sodium hydride is available commercially as 80 % and 60 % dispersions in mineral oil. The light-gray pourable material has an average particle size of 10 mm (Degussa, Chemetall, Ventron). The oil protects the surface of the highly reactive sodium hydride, which easily becomes passivated by the slightest atmospheric exposure or, worse, can ignite on longer contact with air.Использование
Sodium hydride is used to enhance the condensation reactions of carbonyl compounds through the Dieckmann condensation, Stobbe condensation, Darzens condensation and Claisen condensation. It acts as a reducing agent used to prepare diborane from boron trifluoride. It is also used in fuel cell vehicles. Further, it is used to dry some organic solvents. In addition to this, it is involved in the preparation of sulfur ylides, which is utilized for the conversion of ketones into epoxides.Методы производства
Sodium hydride, reactive with water yielding hydrogen gas and NaOH solution, formed by reaction of sodium and hydrogen at about 360 °C (680 °F). Used as a powerful reducing agent.Определение
sodium hydride: A white crystallinesolid, NaH; cubic; r.d. 0.92; decomposesabove 300°C (slow);completely decomposed at 800°C.Sodium hydride is prepared by thereaction of pure dry hydrogen withsodium at 350°C. Electrolysis ofsodium hydride in molten LiCl/KClleads to the evolution of hydrogen;this is taken as evidence for the ionicnature of NaH and the presence ofthe hydride ion (H–). It reacts violentlywith water to give sodium hydroxideand hydrogen, with halogensto give the halide and appropriatehydrogen halide, and ignites spontaneouslywith oxygen at 230°C. It is apowerful reducing agent with severallaboratory applications.Общее описание
A silvery to whitish powder or slurry in oil. Used to make other chemicals.Реакции воздуха и воды
Highly flammable. Ignites or explodes in contact with air of high humidity [Bretherick 1979 p. 107]. Reacts violently with water producing a caustic solution (NaOH) and hydrogen (H2). Heat of reaction may ignite the hydrogen.Профиль реактивности
Sodium hydride is a powerful reducing agent. Attacks SiO2 in glass. Ignites on contact with gaseous F2, Cl2, Br2, and I2 (the last at temperatures exceeding 100°C), especially in the presence of moisture, to form HF, HCl, HBr, and HI [Mellor 2:483 1946-47]. Reacts with sulfur to give Na2S and H2S [Bretherick 1979 p. 107]. Can react explosively with dimethyl sulfoxide [Chem. Eng. News 44(24):7 1966]. Reacts vigorously with acetylene, even at -60°C [Mellor 2:483 1946-47]. Spontaneously flammable in fluorine. Reaction with dimethylformamide, when heated, runs away [Chem. Eng. News, 1982, 60(28), 5]. Initiates a polymerization reaction in ethyl-2,2,3-trifluoropropionate such that the ester decomposed violently [Bretherick 5th ed. 1995]. Presence in the reaction of diethyl succinate and ethyl trifluoroacetate, has twice caused explosions [Chem. Brit., 1983, 19, 645].Опасность
Dangerous fire risk, reacts violently with water evolving hydrogen. Irritant.Угроза здоровью
SOLID: Will burn skin and eyes. Harmful if swallowed.Пожароопасность
FLAMMABLE. MAY EXPLODE ON CONTACT WITH WATER. Accidental contact with water used to extinguish surrounding fire will result in the release of hydrogen gas and possible explosion.Профиль безопасности
The powder ignites spontaneously in air. Flammable when exposed to heat or flame. Potentially explosive reaction with water, diethyl succinate + ethyltrifluoroacetate (above 60℃), dimethyl sulfoxide + heat, sulfur dioxide. Ignition or violent reaction with dimethylformamide (above 50℃), ethyl 2,2,3-trifluoropropionate, oxygen (at 230℃). Incompatible with acetylene + moisture, glycerin, halogens, sulphur. Normal fire extinguishers are unsuitable, use sand, ashes, solurn chloride. The commercial material may contain traces of sodium. When heated to decomposition it emits toxic fumes of Na2O. See also HYDRIDES.Натрий гидрид запасные части и сырье
сырьё
запасной предмет
- Метил 3-амино-4-метил-2-тиофенкарбоксила
- ЭТИЛ 3-AMINOBENZOFURAN-2-CARBOXYLATE
- 4-(TRIMETHYL-UREIDO)-BENZENESULFONYL CHLORIDE
- 3-(3,5-ДИМЕТИЛ-ПИРАЗОЛ-1-ИЛ)-ПРОПИЛАМИН
- (6-(1H-Pyrazol-1-yl)pyridin-3-yl)methanol
- 5-BROMO-2-ETHOXY-PYRIMIDINE
- Спермидин
- Метил никотиноилацета
- 5-фтор-2-оксиндол
- 3-Амино-2 ,2-диметил-1-пропанола
- 4-HYDROXY-2-METHYLPYRIMIDINE
- 4-БРОМ-ПИРАН-2-ОДИН
- Циклооктанон
- 1-Бензил-2-метил-1H-имидазола
- Темафлоксацин
- 3,5-дифторфенилуксусной кислоты
- Furo[2,3-b]pyridine-2-carboxylic acid, 3-amino-, ethyl ester (9CI)
- 2-тетрагидропиран-4-илэтанол
- CIS-9-TETRADECENYL ACETATE
- 1-ВОС-4-гидрокси-4- (гидроксиметил) пиперидин
- N-(4,6-DIMETHYLPYRIMIDIN-2-YL)-N-METHYLBENZENE-1,4-DIAMINE
- 1-БЕНЗИЛ-2-ИМИДАЗОЛКАРБОНОВАЯ КИСЛОТА
- ЭТИЛ-4-МЕТОКСИ-3-ОКСОБУТАНОАТ
- Сарафлоксацин
- Methyl 6-(1H-pyrazol-1-yl)pyridine-3-carboxylate
- 6-(1H-ПИРАЗОЛ-1-ИЛ)НИКОТИНОНИТРИЛ
- Sertaconazole nitrate
- 7-METHYL-1,6-OCTADIENE
- Офлоксацин
- 6-(1H-PYRAZOL-1-YL)NICOTINIC ACID
1of8
Натрий гидрид поставщик
| поставщик | телефон | страна | номенклатура продукции | благоприятные условия |
|---|---|---|---|---|
| +86 13288715578 +8613288715578 |
China | 12459 | 58 | |
| +86-17531190177; +8617531190177 |
China | 6011 | 58 | |
| +8617756083858 | China | 994 | 58 | |
| +86-0371-55170693 +86-19937530512 |
China | 21670 | 55 | |
| +86-021-57951555 +8617317452075 |
China | 1807 | 55 | |
| +86-0551-65418679 +86-18949832763 |
China | 2989 | 55 | |
| +86-13734021967 +8613734021967 |
China | 1011 | 58 | |
| +86-0371-86658258 +8613203830695 |
China | 29897 | 58 | |
| +86 18953170293 | China | 2931 | 58 | |
| 18871490254 | CHINA | 28180 | 58 |
Натрий гидрид Обзор)
1of4