Sodium amide
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7782-92-5[NH2-].[Na+]ODZPKZBBUMBTMG-UHFFFAOYSA-NSodium amide is an odorless colorless solid. Denser than water.
7782-92-5DTXSID2064816CHEBI:1767911.39 at 68 °F (USCG, 1999) - Denser than water; will sink
1.39 @ 20 °C
SOLUBILITY IN LIQ AMMONIA AT 20 °C= ABOUT 0.1%
Soluble in water; insoluble in alcohol.
752 °F at 760 mmHg (USCG, 1999)
400 °C
410 °F (USCG, 1999)
210 °C
Sodium amide is an odorless colorless solid. Denser than water.
Solid; Commercial form is white to olive-green; Quickly absorbs water and carbon dioxide from atmosphere; [Merck Index] White solid with an odor of ammonia; [Hawley] Grey powder or granules with an ammoniacal odor; [Alfa Aesar MSDS]
BEGINS TO VOLATILIZE @ 400 °C & DECOMP INTO ITS ELEMENTS BETWEEN 500 & 600 °C; HEAT OF FORMATION (FOR SOLID) @ 18 °C & 1 ATM: -32.26 KCAL/MOLE; HEAT OF SOLN: -31.06 KCAL/MOLE @ 21 °C. ... FUSED NaNH2 DISSOLVES METALLIC MAGNESIUM, ZINC, MOLYBDENUM, TUNGSTEN, QUARTZ, GLASS, SILICATES & OTHER SUBSTANCES.
安全情報は参考情報です。供給元の安全データシート(SDS)、適用法令、専門家による評価に代わるものではありません。
Danger
H260 (42.1%): In contact with water releases flammable gases which may ignite spontaneously [Danger Substances and mixtures which in contact with water, emit flammable gases]
P223, P231+P232, P260, P264, P264+P265, P273, P280, P301+P330+P331, P302+P335+P334, P302+P361+P354, P304+P340, P305+P354+P338, P316, P317, P321, P363, P370+P378, P391, P402+P404, P405, and P501 (click each P-code to see the statement)
Aggregated GHS information provided per 297 reports by companies from 17 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.
Chemical: Sodium amide (Na(NH2))
Status: Active Update: 25-10-2022 https://echa.europa.eu/registration-dossier/-/registered-dossier/11165
Sodium amide: HSNO Approval: HSR004679 Approved with controls
FLAMMABLE, DANGEROUS FIRE RISK.
The reduction with 1,1-diethoxy-2-chloroethane in the presence of ammonia produces sodium ethoxyacetylide, which is extremely pyrophoric. Sodium amide reacts violently with water and frequently bursts into flame.
Emergency treatment: Corrosives- alkaline; [HSDB] Reacts violently with water producing sodium hydroxide and ammonia; Oxidation products after air exposure may be highly explosive; A severe skin, eye, and mucous membrane irritant; [Merck Index] A strong reducing agent; An explosive peroxide may be produced on storage; May cause caustic burns to skin and eyes; [CAMEO] Reacts violently with water evolving highly flammable gases; Explosive on contact with oxidizing substances; A highly corrosive substance that can cause injury to the skin, eyes, and respiratory tract; Inhalation may cause chemical pneumonitis; [Alfa Aesar MSDS]
Used as a dehydrating agent, in ammonolysis reactions, in Claisen condensations, and for alkylation of nitriles and ketones; Also used to make indigo, hydrazine, ethynyl compounds, acetylenic carbinols, and sodium cyanide; [Merck Index]
DEHYDRATING AGENT; PRODN OF INDIGO & HYDRAZINE; INTERMEDIATE IN PREPN OF SODIUM CYANIDE; IN AMMONOLYSIS REACTIONS; IN CLAISEN CONDENSATIONS, ALKYLATION OF NITRILES & KETONES, SYNTH OF ETHYNYL CMPD, ACETYLENIC CARBINOLS
PREPARED FROM SODIUM METAL & GASEOUS AMMONIA (OR LIQ AMMONIA WITH FERRIC NITRATE CATALYST): DENNIS, BROWNE, INORG SYN 1, 74 (1939); GREENLEE, HENNE, INORG SYN 2, 128 (1946). ...ALTERNATE METHOD: BERGSTROM, ORG SYN, COLL VOL III, 778 (1955).
DRY AMMONIA GAS IS PASSED OVER METALLIC SODIUM @ 350 °C.
解説ナトリウムアミド,無色の正方晶系結晶.Na+ とNH2-からなり,Na+ は四面体型にNH2-に囲まれ,NもNaにひずんだ四面体型に囲まれている.融点210 ℃.約500 ℃ で分解する.室温の空気中で,湿気やCO2を吸う.湿った空気中で加熱するとNaOH,NaNO2,NH3になる.密栓して保存することが大切である.もし,緩い栓のため,不完全酸化されると,爆発性の褐色物質を生じる.潮解性で,水とはげしく反応して,NaOHとNH3になる.液体アンモニアに溶けてアンモノ塩基となる.溶融したものは,Mg,Zn,Mo,Wなどの金属や,ケイ酸塩,ガラスなどを溶かす.還元剤,脱水剤,縮合剤として,有機合成などで利用され,アンモノリシス反応,クライゼン縮合,ニトリルやケトンのアルキル化,フェニルグリシンの環化によるインジゴ合成,ハロゲン化物からアセチレン誘導体の合成などに用いられる.森北出版「化学辞典(第2版)
用途インディゴやヒドラジン、シアン化ナトリウムを工業的に生産する際にナトリウムアミドが用いられる。アンモニアから微量の水を除く乾燥剤として用いられる。また、有機化学では、主に液体アンモニアを溶媒とする合成において塩基として用いられる。長所としては塩基性が強いこととそれに比べ求核性が低いことが挙げられる。しかし通常の有機溶媒への溶解性は乏しいため、リチウムジイソプロピルアミド (LDA) や ナトリウムビス(トリメチルシリル)アミド (NaHMDS) が代用される。
用途合成原料、乾燥剤、脱水剤、融剤。
使用Sodium Amide is widely used in organic chemical synthesis as a strong base in reactions such as in the preparation of phenylacetylene from 1,2-dibromophenylethane. Also used in the synthesis of 2,6-diamination of substituted pyridines as initiator of heterogeneous chichibabin reaction.
読み込み中…
DECOMP IN WATER & ALCOHOL
WHITE TO OLIVE-GREEN SOLID WITH SEA-SHELL FRACTURE /COMMERCIAL PRODUCT/
化学的特性grey powder
SODIUM AMIDE is a powerful reducing agent. Reacts violently with oxidizing agents. Reacts violently with steam and water to form caustic NaOH and NH3 vapors [Bergstrom et al., Chem. Reviews, 12:6 1932]. May form explosive compounds in the presence of water and carbon dioxide [Handling Chemicals Safely 1980 p 826]. Liable to deflagration upon heating and friction. Forms an explosive peroxide on storage. When sodium amide and chromic anhydride are mixed together a vigorous reaction results; the same occurs with other oxidizing agents including dinitrogen tetraoxide, potassium chlorate, sodium nitrite. [Mellor 11:234 1946-47]. Reaction with 1,1-diethoxy-2- chloroethane produces sodium ethoxyacetylide, which is extremely pyrophoric [Rutledge 1968 p. 35]. Reactions with halogenated hydrocarbons may be violently explosive. Sodium amide forms toxic and flammable H2S gas with CS2. (714).
Sodium amide
A: Compounds that form explosive levels of peroxides without concentration
Clark
SEALED CONTAINERS MUST BE STORED IN WELL-VENTILATED AREA.
SHOULD BE STORED IN SEALED CONTAINERS WHICH PREVENT ALL CONTACT WITH AIR DURING STORAGE ...
Goggles or face shield; dust respirator; rubber gloves and shoes. (USCG, 1999)
GOGGLES OR FACE SHIELD; DUST RESPIRATOR; RUBBER GLOVES AND SHOES.
一般的な説明Odorless colorless solid. Denser than water.
使用用途化学合成においては求核性が低いことから、求核攻撃を避けたい場面などにおいて使用できるような強塩基として用いられています。しかし、通常の有機溶媒に対する溶解度が低いため、主に液体アンモニアを溶媒とする反応を中心に使用されることが特徴です。 他の用途として、インディゴや、の原料としての使用が挙げられます。インディゴは、染料であり、デニムやジーンズを染め上げる時に使用されてきました。ナトリウムアミド単体で使用する場合は、アンモニア中の微量な水分を除く乾燥剤、脱水剤としても使用されます。2018年には、塩化物とナトリウムアミドを混合すると瞬間的な昇温反応によって酸窒化物を合成できるという反応が報告されました。
製造方法Sodium amide is prepared by passing dry ammonia gas over sodium metal at 350°C: 2Na + 2NH3 → 2NaNH2 + H2Also, it may be prepared by reacting sodium metal with liquid ammonia in the presence of a catalyst such as iron(III) nitrate. The compound must be stored in well-sealed containers free from air or moisture.
純化方法It reacts violently with H2O and is soluble in liquid NH3 (1% at 20o). It should be stored in wax-sealed containers in small batches. It is very hygroscopic and absorbs CO2 and H2O. If the solid is discoloured by being yellow or brown in colour, then it should be destroyed as it can be highly EXPLOSIVE. It should be replaced if discoloured. It is best destroyed by covering it with much toluene and slowly adding dilute EtOH with stirring until all the ammonia is liberated (FUME CUPBOARD). [Dennis & Bourne Inorg Synth I 74 1939, Schenk in Handbook of Preparative Inorganic Chemistry (Ed. Brauer) Academic Press Vol I p 465 1963, Bergstrom Org Synth Coll Vol III 778 1955.]
定義A white ionic solid formed by passing dry ammonia over sodium at 300–400°C. The compound reacts with water to give sodium hydroxide and ammonia. It reacts with red-hot carbon to form sodium cyanide and with nitrogen(I) oxide to form sodium azide. Sodamide is used in the Castner process and in the explosives industry.