Ammonium hydroxide vapor

Aluminum chloride, 26% Aluminum hydroxide Aluminum nitride Ammonia, dry vapor Ammonium acetate solution Ammonium bisulfate Ammonium bromide Ammonium carbonate Ammonium chloride, 10% Ammonium dichloride Ammonium hydroxide Ammonium hydroxide vapor Ammonium molybdate Ammonium nitrate Argon... 

Two 20 ul aliquots of both the sample and the synthetic standard are applied to the thin-layer plate, the spots are dried with a heat gun and the chromatograms eluted for 30 -40 min in the development solvent. The resulting chromatogram is dried with a heat gun, sprayed with the detection reagent, redried, exposed to ammonium hydroxide vapors and scanned on the photodensitometer. 

This carbon dioxide-free solution is usually treated in an external, weU-agitated liming tank called a "prelimer." Then the ammonium chloride reacts with milk of lime and the resultant ammonia gas is vented back to the distiller. Hot calcium chloride solution, containing residual ammonia in the form of ammonium hydroxide, flows back to a lower section of the distiller. Low pressure steam sweeps practically all of the ammonia out of the limed solution. The final solution, known as "distiller waste," contains calcium chloride, unreacted sodium chloride, and excess lime. It is diluted by the condensed steam and the water in which the lime was conveyed to the reaction. Distiller waste also contains inert soHds brought in with the lime. In some plants, calcium chloride [10045-52-4], CaCl, is recovered from part of this solution. Close control of the distillation process is requited in order to thoroughly strip carbon dioxide, avoid waste of lime, and achieve nearly complete ammonia recovery. The hot (56°C) mixture of wet ammonia and carbon dioxide leaving the top of the distiller is cooled to remove water vapor before being sent back to the ammonia absorber. 

Chemical products are produced from technical-grade oxide in two very different ways. Molybdenum trioxide can be purified by a sublimation process because molybdenum trioxide has an appreciable vapor pressure above 650°C, a temperature at which most impurities have very low volatiUty. The alternative process uses wet chemical methods in which the molybdenum oxide is dissolved in ammonium hydroxide, leaving the gangue impurities behind. An ammonium molybdate is crystallized from the resulting solution. The ammonium molybdate can be used either directly or thermally decomposed to produce the pure oxide, MoO. ... 

The vapor pressure is reduced. This has a significant effect on the rate of release of material boiling at less than ambient temperature. It may be possible to store an aqueous solution at atmospheric pressure, such as aqueous ammonium hydroxide instead of anhydrous ammonia. 

Thorium oxide on activated carbon was prepared by absorption of thorium nitrate from its solution in anhydrous acetone on the activated carbon Supersorbon. The excess solution was decanted, the catalyst was dried at 80 °C, and the adsorbed thorium oxide was decomposed by excess 5% ammonium hydroxide solution. After repeated washing and decanta-nation with distilled water and acetone, the catalyst was dried at 180°C. It was then stabilized by heating to 360°C for 5 hr in a stream of nitrogen. The content of thorium oxide was 2.9% (wt.). The BET surface area was 870 m2/g. Prior to kinetic measurements, the catalyst was modified by passing over acetic acid vapors (100 g acid/1 g catalyst). 

Schwenzfeier-Pomelee A process for purifying beryllium and producing glassy beryllium fluoride. Beryllium hydroxide is dissolved in aqueous ammonium hydrogen fluoride various metal impurities are removed by successive precipitations, and ammonium fluoroberyllate is crystallized under vacuum. When this is heated, ammonium fluoride vaporizes and molten beryllium fluoride remains. 

Ammonium halides, 2 714-715 vapor pressure, 2 715t Ammonium hydrosulfide, 2 728 Ammonium hydroxide, for fermentation, 11 38... 

This preparation must be carried out in a hood having good ventilation. Methyl sulfate has a high vapor pressure in spite of its high boiling point and is very poisonous. Ammonia is a specific antidote and should be kept on hand to destroy any of the ester accidentally spilled. It is advisable to wash the hands in dilute ammonium hydroxide frequently. 

Most of us are familiar with the hquid form of ammonia known as ammonium hydroxide (NH OH), a colorless liquid that, with its strong odor, is irritating to the eyes and potentially harmful to the moist mouth and nose, throat, and lungs if its vapors are breathed. Weak solutions of NH OH are ingredients in household cleaning ammonia. Concentrated ammonium hydroxide has many industrial uses, including the manufacture of rayon, fertilizers, refrigerants, rubber, pharmaceuticals, soaps lubricants, inks, explosives, and household cleaners. 

Liquid anhydrous ammonia in contact with the eyes may cause serious injury to the cornea and deeper structures and sometimes blindness on the skin it causes first- and second-degree burns that are often severe and, if extensive, may be fatal. Vapor concentrations of 10,000 ppm are mildly irritating to the moist skin, whereas 3 0,000 ppm or greater causes a stinging sensation and may produce skin burns and vesiculation. With skin and mucous membrane contact, burns are of three types cryogenic (from the liquid ammonia), thermal (from the exothermic dissociation of ammonium hydroxide), and chemical (alkaline). ... 

Reddish brown metal face-centered cubic crystal density 8.92 g/cm Mohs hardness 2.5 to 3.0 Brinnel hardness 43 (annealed) electrical resistivity 1.71 microhm-cm at 25°C Poisson s ratio 0.33 melts at 1,083°C vaporizes at 2,567°C insoluble in water dissolves in nitric acid and hot sulfuric acid slightly soluble in hydrochloric acid also soluble in ammonium hydroxide, ammonium carbonate and potassium cyanide solutions. 

White cubic crystal which turns blue when heated at 178°C density 4.14 g/cm the mineral nantokite (CuCl) has density 4.14 g/cm , hardness 2.5 (Mohs), refractive index 1.930 melts at 430°C becoming a deep, green hquid vaporizes around 1,400°C vapor pressure 5 torr at 645°C and 400 torr at 1,250°C low solubihty in water (decomposes partially) Ksp 1.72x10 insoluble in ethanol and acetone soluble in concentrated HCl and ammonium hydroxide. 

White crystalline powder turns violet on exposure to light density 7.004 g/cm3 at 20°C melts at 430°C vaporizes at 720°C vapor pressure 20 torr at 550°C shghtly soluble in water, 0.29 g/mL at 15.6°C sparingly soluble in boding water, 2.4 g/lOOmL insoluble in alcohol, acetone and ammonium hydroxide. 

Enriched UF6 is processed into U02 powder at fuel fabrication facilities using one of several methods. In one process uranium hexafluoride is vaporized and then absorbed by water to produce uranyl fluoride, U02F2, solution. Ammonium hydroxide is added to this solution and ammonium diuranate is precipitated. Ammonium diuranate is dried, reduced, and milled to make uranium dioxide powder. The powder is pressed into fuel pellets for nuclear reactors. 

Solutions containing ammonium sulfate, with or without the addition of ammonium hydroxide, have been widely used. The ammonium system can operate effectively only within a pH range of 4.0 to 7.0. As the pH value increases above 7.0, progressively more gaseous ammonia is liberated and this reacts in the gaseous phase with water vapor and SO2 to produce a dense aerosol (white plume) which is difficult for scrubbers to remove. In an ammonia system, in order to regenerate the scrubbing solution, the ammonium bisulfite and sulfite mixture is heated... 

A methanol extract of the sample is prepared and chromatographed on a Silica Gel GF chrcmatoplate with ethyl acetate, methanol, ammonium hydroxide (100, 10, 10, v/v) mobile phase. The Rf comparison to a reference similarily chromatographed, the response to diazotized p-nitroaniline (imidazole nucleus detection), U.V. (254 nm), and I2 vapors serves to identify cimetidine. 

Volatilization of ammonia from aqueous solutions. When an aqueous solution of ammonia (ammonium hydroxide) is warmed, some of the dissolved ammonia volatilizes in the gaseous form. This result is to be anticipated in light of the manner in which the solubility of gases in liquids is generally influenced by an increase in temperature. In the use of this method, the quantity of heat supplied should be such that a minimum quantity of water is vaporized. 

Reducing Sugars Dissolve 500 mg of sample in 10 mL of water, warm, and make the solution alkaline with 1 mL of 6 N ammonium hydroxide. Pass hydrogen sulfide gas into the solution to precipitate the iron, and allow the mixture to stand for 30 min to coagulate the precipitate. Filter, and wash the precipitate with two successive 5-mL portions of water. Acidify the combined filtrate and washings with hydrochloric acid, and add 2 mL of 2.7 N hydrochloric acid in excess. Boil the solution until the vapors no longer darken lead acetate paper, and continue to boil, if necessary, until the solution has been concentrated to about 10 mL. Cool, add 5 mL of sodium carbonate TS and 20 mL of water, filter, and adjust the volume of the filtrate to 100 mL with water. Add 2 mL of alkaline cupric tartrate TS to 5 mL of filtrate, and boil for 1 min. No red precipitate forms within 1 min. 

Citrate, Oxalate, Phosphate, or Tartrate Dilute 5 mL of sample to 50 mL with recently boiled and cooled water. Add 6 N ammonium hydroxide or 3 N hydrochloric acid to 4 mL of this solution, if necessary, to bring the pH to between 7.3 and 7.7. Add 1 mL of calcium chloride TS, and heat in a boiling water bath for 5 min. The solution remains clear. Cyanide (Caution Because of the extremely poisonous nature of potassium cyanide, conduct this test in a fume hood, and exercise great care to prevent skin contact and the inhalation of particles or vapors of solutions of the material. Do not pipet solutions by mouth.)... 

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