Sodium hydride dispersionin mineral oil
Sodium hydride
CAS: 7646-69-7
Molecular Formula: HNa
Sodium hydride dispersionin mineral oil - Names and Identifiers
| Name | Sodium hydride |
| Synonyms | 340F NAH 80 0.84-0.86 SodiumHydride Sodium hydride SODIUM HYDRIDE SODIUM HYDRIDE IN OIL Sodium Hydride in oil SODIUM HYDRIDE DISPERSION Sodium hydride inoil gray powder Sodium hydride dispersionin mineral oil |
| CAS | 7646-69-7 |
| EINECS | 231-587-3 |
| InChI | InChI=1/Na.H/rHNa/h1H |
Sodium hydride dispersionin mineral oil - Physico-chemical Properties
| Molecular Formula | HNa |
| Molar Mass | 24 |
| Density | 1.2 |
| Melting Point | 800 °C (dec.) (lit.) |
| Flash Point | 185°C |
| Water Solubility | REACTS |
| Solubility | Soluble in molten sodium. Insoluble in ammonia, benzene,carbon tetrachloride, carbon disulfide and all organic solvents. |
| Appearance | powder (moistened with oil) |
| Color | White to pale gray |
| Exposure Limit | ACGIH: TWA 5 mg/m3OSHA: TWA 5 mg/m3NIOSH: IDLH 2500 mg/m3; TWA 5 mg/m3; STEL 10 mg/m3 |
| Merck | 14,8625 |
| Storage Condition | Store below +30°C. |
| Sensitive | Air & Moisture Sensitive |
| Physical and Chemical Properties | Density 1.2 melting point 800°C (dec.) water-soluble reactions |
| Use | It is an important reducing agent in pharmaceuticals, spices and dyes, and can also be used as a desiccant, alkylating agent, etc. |
Sodium hydride dispersionin mineral oil - Risk and Safety
| Risk Codes | R15 - Contact with water liberates extremely flammable gases R36 - Irritating to the eyes R35 - Causes severe burns R11 - Highly Flammable |
| Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S43 - In case of fire use ... (there follows the type of fire-fighting equipment to be used.) S7/8 - S43A - S24/25 - Avoid contact with skin and eyes. S7 - Keep container tightly closed. S60 - This material and its container must be disposed of as hazardous waste. S22 - Do not breathe dust. S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) S37/39 - Wear suitable gloves and eye/face protection S16 - Keep away from sources of ignition. |
| UN IDs | UN 1427 4.3/PG 1 |
| WGK Germany | 3 |
| RTECS | WB3910000 |
| FLUKA BRAND F CODES | 10-21 |
| TSCA | Yes |
| HS Code | 28500090 |
| Hazard Class | 4.3 |
| Packing Group | I |
Sodium hydride dispersionin mineral oil - Upstream Downstream Industry
| Raw Materials | Methyl alcohol Sodium Orthoboric acid Hydrogen |
| Downstream Products | Cartap Cedryl Methyl Ether |
Sodium hydride dispersionin mineral oil - Reference Information
| NIST chemical information | information provided by: webbook.nist.gov (external link) |
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| Introduction | sodium hydride (sodium hydrogen for short) belongs to ionic crystals, salt-like compounds, in which hydrogen is a negative monovalent ion. When heated unstable, not to be melted or decomposed, sodium hydride and water hydrolysis reaction to generate sodium hydroxide and release hydrogen. |
| properties | pure sodium hydride is silver needle-like crystals, and the products of sodium hydride on the market are generally fine crystalline gray powder, dispersed in oil at a ratio of 25% to 50%. The relative density was 0.92. Sodium hydride crystal is a rock salt type structure (lattice constant a = 0.488nm), and like lithium hydride, hydrogen exists as an anion in the ionic crystal. The heat of formation is 69.5kJ · mol-1, which is decomposed into metallic sodium and hydrogen at 800 ℃. Sodium hydride can react vigorously with water and lower alcohols, causing combustion or explosion. Automatic ignition in moist air. Soluble in molten sodium hydroxide, insoluble in liquid ammonia, benzene, carbon disulfide, carbon tetrachloride. At moderate temperatures, sodium hydride reacts with liquid ammonia to form sodium amino acid. |
| preparation | Although sodium hydride can be prepared by reacting hydrogen directly with sodium metal at high temperature, however, in the industry, the sodium hydride is prepared by using a mineral oil such as kerosene, adding a dispersant such as anthracene, suspending the sodium metal therein, and reacting with high-pressure hydrogen gas. The product is washed with hexane, dried in a stream of nitrogen, stored sealed in an inert gas, or treated intact in paraffin oil. |
| quenching method | sodium hydride is generally 60% (stored in oil), if you need to remove oil, you can wash with n-hexane, then pour out the n-hexane (be sure to avoid drying out). In general, it is not necessary to wash too many times, unless the oil affects the reaction (e. G., the system is too viscous, and the oil is combined with the generation of bubbles, and the material is easy to be washed. The post-treatment is that if the amount is not large, it can be directly quenched with water. If the amount is large, the water is slowly dropped. This was suspended in dry tetrahydrofuran and ethanol or isopropanol was added slowly with stirring until no more hydrogen was evolved and the mixture was clear. |
| Related chemical reaction | sodium hydride is a strong reducing agent, such as titanium tetrachloride can be reduced to metal titanium at 400 ℃: tiCl4 = = 4NaH Ti 4NaCl 2H2. decomposition occurs when heated to 425 °c under normal pressure. And the generation of hydrogen gas. With water can produce a strong reaction, and even a fire, and the formation of sodium hydroxide and the release of hydrogen. Reaction with liquid ammonia to form an amine salt (sodium amino acid) and evolution of hydrogen gas. NaH NH3 --(H2)→ NaNH2 H2. sodium hydride also reacts with halogens, sulfur vapors, sulfur dioxide and carbon dioxide at elevated temperatures. The reduction is very strong, and the metal can be released from the metal oxide and chloride. TiCl4 4NaH → Ti NaCl 2H2. diborane can be formed by the reaction of sodium hydride with boron trifluoride. 2BF3 6NaH → B2H6 6NaF. sodium hydride is stable below 230 ° C. In dry air, above which it burns into sodium oxide. If trace amounts of sodium are present, fires are likely to occur even at low temperatures. In case of fire, water and organic fire extinguishing agents must not be used. |
| Application | sodium hydride (sodium hydrogen) is mainly used as a reducing agent for metal chloride, a reducing agent for organic synthesis, a hydrogenation agent, the condensing agent, when used as a reducing agent, is mostly suspended in an oil, preferably rinsed with a large amount of water when touched on the skin. sodium hydride (sodium hydrogen) can be used in condensation and alkylation reactions. And can be used for the polymerization catalyst manufacturing pharmaceutical synthesis and perfume industry, manufacturing borohydride, metal surface rust remover, reducing agent, condensing agent, drying agent and the reaction reagent of the Clesson. used as condensing agent, alkylating agent and reducing agent, etc. It is an important reducing agent in pharmacy, perfume and dye, and can also be used as drying agent, alkylating agent |
| Application | sodium hydride (sodium hydrogen) can be used in condensation and alkylation reactions, and can be used for the polymerization catalyst manufacturing pharmaceutical synthesis and perfume industry, manufacturing borohydride, metal surface rust remover, reducing agent, condensing agent, drying agent and the reaction reagent of the Clesson. |
| category | water burning articles |
| explosive hazard characteristics | explosion of hydrogen emitted by water and moist air |
| flammability hazard characteristics | when water or moist air emits hydrogen |
| storage and transportation characteristics | The warehouse is ventilated and dried at low temperature; It is stored separately from oxidant, halogen and strong acid |
| extinguishing agent | dry powder, dry sand, dry powder |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
Last Update：2024-04-09 20:49:11
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