aminosodium(Soudium amide)inorganic compound, molecular formula is NaNH ₂, molecular weight is 39.0123, white solid, melting point 210 ℃, boiling point 400 ℃, strongReducibility, generated by severe hydrolysis when encountering watersodium hydroxideAnd ammonia.It decomposes into sodium, nitrogen, hydrogen and ammonia when heated to 300-330 ℃ in vacuum.meetethanolSlow reaction.Corrosive andHygroscopicity。
It is unstable in the air and oxidized when heatedsodium hydroxide, water andammonia。It starts to decompose at 400 ℃ and rapidly decomposes at 500~600 ℃.yesDeliquescence, react violently with water to form ammonia and sodium hydroxide.In heatethanolMedium decomposition.It is heated to 300~330 ℃ in vacuum and decomposed into sodium, nitrogen and ammonia.React violently in case of acid.Have strongReducibility, encounteredStrong oxidantMay burn and explode.Flammable and explosive.Corrosive.
1. High temperature method: dry and deoxidized ammonia passes through 250~360 ℃ metalsodiumPrepared:
twoCryogenics: In the liquid ammonia solution below - 33 ℃, add metal sodium, and use threeFerric chlorideAs a catalyst, after the reaction is completed, the solvent liquid ammonia can be evaporated to dryness to obtain the white solid product sodium amino:
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Sodium amino needs toNoble gasperhapsNitrogen protectionLower storage.In the presence of a small amount of water and oxygen, long standing will produce unstableperoxide, there is a risk of explosion.（2NaNHtwo+ 4Otwo→ NatwoOtwo+ 2NOtwo+ 2HtwoO）
preservationhazardous chemicals Post processingA small amount of residue can be carefully washed with a large amount of water.More can be put intolueneSolution, then slowly addAnhydrous ethanol, to be fully reacted.For a large number of cases, it is better to ask a relatively professional company to deal with them.
[Precautions] The yellowing and browning sodium amino should be destroyed as soon as possible. When opening the lid, do not face the face.
