Bismuth nitrite

Normal bismuth nitrite, Bi(N02)3, is unknown. L, Vanino and P. Hartl13 prepared bismuthyl nitrite, Bi0(N02). H20, by adding sodium nitrite to an aq. soln. of mannitol bismuth nitrate. The yellowish-white precipitate decomposes above 60°, and readily dissolves in hydrochloric acid, forming a clear soln. on dilution. 

Bismuth subnitrate [1304-85-4] (basic bismuth nitrate) can be prepared by the partial hydrolysis of the normal nitrate with boiling water. It has been used as an antacid and in combination with iodoform as a wound dressing (183). Taken internally, the subnitrate may cause fatal nitrite poisoning because of the reduction of the nitrate ion by intestinal bacteria. 

A unique method for the degradation of 17-hydroxy-20-oxygenated pregnanes to 17-ketoandrostanes involves the photolysis of the corresponding nitrite esters.While this generally is equivalent to bismuthate or periodate oxidations, it is the only mild method for the conversion of a 17-hydroxy-... 

Heating with the following solids, their fusions, or vapours (a) oxides, peroxides, hydroxides, nitrates, nitrites, sulphides, cyanides, hexacyano-ferrate(III), and hexacyanoferrate(II) of the alkali and alkaline-earth metals (except oxides and hydroxides of calcium and strontium) (b) molten lead, silver, copper, zinc, bismuth, tin, or gold, or mixtures which form these metals upon reduction (c) phosphorus, arsenic, antimony, or silicon, or mixtures which form these elements upon reduction, particularly phosphates, arsenates,... 

Atomic hydrogen is a powerful reducing agent, even at room temperature. For example, it reacts with the oxides and chlorides of many metals, including silver, copper, lead, bismuth, and mercury, to produce the free metals. It reduces some salts, such as nitrates, nitrites, and cyanides of sodium and potassium, to the metallic state. It reacts with a number of elements, both metals and nonmetals, to yield hydrides such as NH3, NaH, KH, and PH3. Sulfur forms a number of hydrides the simplest is H2S. Combining with oxygen, atomic... 

Bismuth tritelluride, 4 24 physical properties of, 4 20t Bismuth trithiocyanate, 4 25 Bismuth Vanadate Yellow, 19 405-406 pigment for plastics, 7 370t Bismuthyl carbonate hemihydrate, 4 25 Bismuthyl nitrate hemihydrate, 4 25 Bismuthyl nitrite hemihydrate, 4 25 Bis(lV-maleimidomethyl) ether (BME), hemoglobin modifier, 4 113 Bisoprolol fumarate, molecular formula and structure, 5 156t Bis(pentafluorophenyl)borane, 13 638 Bis(pentafluorophenyl)tri-4-tolylbismuth, 4 35... 

W. C. Ball and H. H. Abram added 10 c.c. of bismuth nitrate soln. to 40 c.c. of a 50 per cent. soln. of sodium nitrite, and then a soln. of 5 grms. of ammonium nitrate and 2 grms. of nickel nitrate in 20 c.c. of water—all cooled to 0°—in a few minutes a yellowish-brown, microcrystalline powder of ammonium nickel nitrito-bismuthite was formed. The composition of different specimens varied considerably, and the salt slowly decomposes it is quickly hydrolyzed by water. In an analogous manner, potassium nickel nitritobismuthite, K4NiBi2(N03)12.6H20, was formed as an unstable, yellowish-brown, microcrystalline powder similarly... 

Thiourea test, CS(NH2)2. Solid or dissolved thiourea precipitates selenium as a red powder from cold dilute solutions of selenites. Tellurium and bismuth give yellow precipitates, whilst large amounts of nitrite and of copper interfere. 

The salts of sodium react with a solution of potassium nitrite and the nitrates of bismuth and caesium, yielding a yellow, crystalline precipitate of the formula 5Bi(N02)3,9CsN02,6NaN02. This reaction is applicable to the detection and estimation of sodium.2... 

Rubidium salts impart a reddish-violet coloration to the Bunsen flame, similar to that characteristic of potassium derivatives. Like potassium, rubidium forms several salts not readily soluble, among them the chloroplatinate, perchlorate, silicofluoride, bismuth thiosulphate, and primary tartrate. It can also be detected by the formation of Bi(N02)3,2RbN02,NaN02, a yellow crystalline precipitate produced by adding a solution of bismuth nitrate and sodium nitrite to one of a rubidium salt.2... 

Bismuth Subnitrate. Bismuth subnitrate was the first contrast agent used clinically to visualize the alimentary tract (36). It was found to be toxic in humans through the reduction from nitrate to nitrite as a result, bismuth subcarbonate was substituted (82). When the toxic action was traced to the metal itself, the use of bismuth salts was discontinued. 

Liquid metals are used when temperature requirement is so high that even the nitrate/nitrite salt mixture becomes unsuitable. The most commonly used liquid metal is a eutectic mixture of sodium and potassium (44%). This has a very broad temperature range (40-760°C) and very high thermal conductivity. Lead and lead-bismuth eutectic can be used up to 900° C. There are several disadvantages with the use of liquid metals. Special precautions must be taken while using alkali metals because they react violently with water and burn in air. Mercury, lead, and bismuth-based mixtures are highly toxic, hence their applications are restricted. One common use of liquid metals is in the cooling of nuclear reactors. 

The bismuth phosphate process consisted of a number of steps in which plutonium is made alternatively soluble and insoluble. Fuel elements containing plutonium, uranium, and fission products were first dissolved in nitric acid. Plutonium was reduced to the tetravalent state by addition of sodium nitrite. Plutonium phosphate Pu3 (P04)4 was coprecipitated with bismuth phosphate BiP04, by addition of bismuth nitrate and sodium phosphate. Coprecipitation of uranium was prevented by the presence of sufficient sulfate ion to form anionic UO2(804)2. The BiP04 precipitate was redissolved in nitric acid and subjected to two decontamination cycles to purify the plutonium. In each cycle the plutonium was oxidized to the soluble hexavalent state by NaBiOs or other strong oxidant. Next bismuth phosphate was again precipitated, to remove fission products while hexavalent plutonium remained in solution. Then plutonium was reduced to the tetravalent state and again coprecipitated with bismuth phosphate. 

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