Sodium amide

Post-treatment is if the amount is not large, it can be directly quenched with water, and if the amount is large, slowly add water. It is suspended in dry tetrahydrofuran, stirring and slowly adding ethanol or isopropyl alcohol until no more hydrogen is released and clarified.

Sodium amino, also known as sodium amino or sodium ammonia, is a white or olive green crystalline powder, with ammonia flavor, chemical formula NaNH2, molecular weight 39.01, melting point of 210℃, boiling point of 400℃. When heated to 500 ~ 600℃, it is decomposed into sodium, nitrogen and hydrogen. It reacts violently with water to form sodium hydroxide and gives off ammonia gas. It is slightly soluble in liquid ammonia and reacts slowly with alcohol. Quickly absorb carbon dioxide and water in the air, should be sealed storage. Liquid can dissolve metal magnesium, zinc, molybdenum, tungsten and quartz, glass, silicate and other substances. An ionic compound consisting of a sodium ion and an ammonia molecule that has removed a hydrogen atom to form the -1 valence group aminoNH-2. Sodium aminide is flammable, explosive, corrosive and deliquable. Because amino group has a lone electron pair, easy to bind protons, so in water strongly hydrolyzed, its aqueous solution is alkaline: NaNH2+H2O=NaOH+NH3. Soluble in liquid ammonia and hot ethanol. Dust is toxic. Severe skin, eye and respiratory irritation. Can cause corrosive burns on contact with skin. Used as an ammoniating agent in organic synthesis; Condensation accelerator; Dehydrating agent, dehalogenating agent; Initiators for polymerization and raw materials for the manufacture of hydrazine, sodium cyanide, azide, cyanide, hydrazine and indigo.
Sodium amino is easily oxidized in the air, generating a layer of yellow oxidation products on the surface. Some of these oxidation products are explosive and may detonate due to friction or heat. When sodium aminoide is heated in a vacuum to 300 ~ 330 ° C, it is decomposed into nitrogen, sodium, hydrogen and ammonia. Therefore, it should be sealed in a bottle filled with an inert atmosphere to avoid contact with air, water or fire to avoid explosion and fire. Sodium amino and carbon monoxide reaction can produce sodium cyanide, can facilitate this reaction to produce sodium cyanide. Sodium amino is usually used as a condensation accelerator, dehydrating agent, alkylating agent in organic synthesis. In the industry, sodium amination is obtained by the reaction of molten sodium and gaseous ammonia at 300 ~ 400℃, and in the laboratory, it is obtained by the reaction of sodium and liquid ammonia in the presence of a catalyst at room temperature. The dust is toxic and can cause caustic burns and can severely irritate the eyes, skin and respiratory system.
When disposing of escaped materials, wear a gas mask and gloves, mix with dry sand and soil and send it to an open place, react with a large amount of water, and then release it into the wastewater system. The polluted ground should also be washed with water; Skin contact, eye irritation, should be immediately washed with water; Stray into the mouth, should immediately gargle, drinking water and vinegar or 1% acetic acid, and then sent to the hospital for treatment. White crystalline powder. The relative density is 1.40. Melting point 210℃. Boiling point 400℃. Unstable in air, it heats and oxidizes to form sodium hydroxide, sodium nitrite and ammonia. Decomposition begins at 400℃. 500 ~ 600℃ rapid decomposition. It is deliquescent and reacts violently with water to form ammonia and sodium hydroxide. It breaks down in hot alcohol. It is heated in vacuum to 300 ~ 330℃ and decomposed into nitrogen, sodium, hydrogen and ammonia. Flammable and explosive. It's corrosive. It is used as a condensation accelerator in organic chemical reactions. It is the raw material of vitamin A synthesis. Also used as dehydrating agent, dehalogenating agent, alkylating agent, ammoniating agent. The dissociation of NHf ions in liquid ammonia was used as an initiator for the production of polyvinyl chloride by anionic polymerization. It is also used in the manufacture of azide compounds, cyanide, indigo and hydrazine. Used for sodium cyanide production, organic synthesis and drug manufacturing Commonly used as organic synthesis condensation accelerator, dehydrating agent and so on. In organic chemical reactions as A condensation accelerator, is the raw material for the synthesis of vitamin A, also used as dehydrating agent, dehalogenated agent, alkylating agent, ammoniating agent, in liquid ammonia, dissociation of NHT ions as anionic polymerization of polyvinyl chloride initiator, also used in the manufacture of fine nitridation mixture, nitrides, sodium cyanide, red blue and hydrazine. The metal sodium is melted at 97 ~ 100℃ by high temperature method, and the dehydrated liquid ammonia is slowly heated to 350 ~ 360℃ for reaction to produce sodium amino and hydrogen. After the reaction, it is cooled, condensed into thin sheets, and then crushed to produce sodium amino products. its
2Na+2NH3→2NaNH2+H2↑ Burning objects in contact with water Reacts violently with water, produces flammable gas, may explode Decomposition in water produces toxic nitrogen oxides; Flammable and explosive hydrogen and corrosive sodium hydroxide Warehouse ventilation and low temperature drying; Store separately from acid and alkali; moisture-proof Dry sand, carbon dioxide