Metal azides sodium azide

Metallic cyanides, sodium azide and hydrogen azide form explosive mixtures with nitric acid. 

M.p. —80°C, b.p. 37°C. Prepared from sodium azide and acid or (N2Hj) plus nitrous acid, HNO2. Heavy-metal salts, azides, are used as detonators, alkali metal salts are stable and azides are used synthetically in organic chemistry. 

Corrosion products and deposits. All sulfate reducers produce metal sulfides as corrosion products. Sulfide usually lines pits or is entrapped in material just above the pit surface. When freshly corroded surfaces are exposed to hydrochloric acid, the rotten-egg odor of hydrogen sulfide is easily detected. Rapid, spontaneous decomposition of metal sulfides occurs after sample removal, as water vapor in the air adsorbs onto metal surfaces and reacts with the metal sulfide. The metal sulfides are slowly converted to hydrogen sulfide gas, eventually removing all traces of sulfide (Fig. 6.11). Therefore, only freshly corroded surfaces contain appreciable sulfide. More sensitive spot tests using sodium azide are often successful at detecting metal sulfides at very low concentrations on surfaces. 

Vehicle air bags protect passengers by allowing a chemical reaction to occur that generates gas rapidly. Such a reaction must be both spontaneous and explosively fast. A common reaction is the decomposition of sodium azide, NaN , to nitrogen gas and sodium metal. 

The precipitate from cerium nitrate and sodium azide is explosive. See other metal azides... 

See Pentaamminechlororuthenium chloride Sodium azide See related METAL AZIDES... 

See Cadmium azide (reference 2), Sodium azide Heavy metals... 

Addition of water to sodium azide which had been heated strongly caused a violent reaction. This was attributed to formation of metallic sodium or sodium nitride. 

Sodium azide Heavy metals, 4758 Sulfuric acid Hydrofluoric acid, 4479 Vinyl acetate Desiccants, 1532 See ASSESSMENT OF REACTIVE CHEMICAL HAZARDS... 

No, the editor didn t know what this name meant either.) It means salts of the triva-lent anions of Group V, restricted in [1] to arsenides, antimonides and bismuthides and prepared by reaction of sodium pnictides with anhydrous halides of transition and lanthanide metals. This violently exothermic reaction may initiate as low as 25°C. Avoidance of hydrated halides is cautioned since these are likely to react uncontrollably on mixing. Another paper includes a similar reaction of phosphides, initiated by grinding [2], Nitrides are reported made from the thermally initiated reaction of sodium azide with metal halides, a very large sealed ampoule is counselled to contain the nitrogen [3],... 

See Sodium azide See METAL NON-METALLIDES METAL HALIDES METATHESIS REACTIONS... 

See Sodium chlorate Aluminium, Rubber Metal azides... 

The reaction of aminoguanidine bicarbonate (84) with sodium nitrite in the presence of excess acetic acid produces 1,3-ditetrazolyltriazine (89), another nitrogen-rich heterocycle (C2H3N11 = 85 % N) which readily forms explosive metal salts. The reaction of aminoguanidine bicarbonate (84) with sodium nitrite in the presence of mineral acid yields guanyl azide (90), of which, the perchlorate and picrate salts are primary explosives. Guanyl azide (90) reacts with sodium hydroxide to form sodium azide, whereas reaction with weak base or acid forms 5-aminotetrazole. ... 

Nitrogen Is binding energies have been determined by AT-ray p.e. spectroscopy for [Rh(CO)2(N3)]2, together with some other metal azides. The similarity of their spectra to that of sodium azide suggests that the internal bonding of N3 is little affected by co-ordination i.e. the Rh—N3 bond is essentially ionic. 

Sodium azide is not as sensitive as lead azide or silver azide to friction or mechanical shock. Since sodium azide reacts with metal oxides to generate nitrogen gas, mixtures of sodium azide and metal oxides are used as pyrolants in gas generators. However, sodium azide reacts with copper and silver to form the corresponding azides, both of which are detonable pyrolants. 

P25 Each of these [previous methods] involves one or more of the following drawbacks uses expensive and toxic metals, demonstrates severe water sensitivity, or produces hydrazoic acid, which is highly toxic and explosive as well as volatile. The few methods that seek to avoid hydrazoic acid liberation during the reaction, by avoiding acidic conditions, require a very large excess of sodium azide. In addition, ah of the known methods use organic solvents, in particular, dipolar aprotic solvents such as DMF. This is one of the solvent classes that process chemists would rather not use. (Adapted from Demko and Sharpless, 2001)... 

Methylene chloride. Magnesium metal turnings, Tetrahydrofuran, Arsenic trichloride. Hexanes Mercury-II-nitrate, Sodium azide Mercury, Nitric acid. Ethanol Mercury, Nitric acid. Alcohol Ammonia, Mercury oxide. Nitric acid... 

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