Ammonium hydrogen carbonate, “vapor

Aminotriptyline lb 100-102 Amitrol lb 418 Ammonia la 86, 87,166 -, dipole moment la 97 Ammonium cations la 144 Ammonium compounds, quaternary lb 48,292,358 -, quaternary salts lb 48 Ammonium hydrogen carbonate, vapor la 86... 

Ammonium hydrogen carbonate vapor leads to fluorescent products using heat with many organic... 

Ammonium bicarbonate, also known as ammonium hydrogen carbonate or ammonium acid carbonate, is easily formed. However, it decomposes below its melting point, dissociating into ammonia, carbon dioxide, and water. If this process is carefully controlled, these compounds condense to reform ammonium bicarbonate. The vapor pressures of dry ammonium bicarbonate are shown below (7). (To convert kPa to mm Hg, multiply by 7.5.)... 

Such reactions can be promoted by exposing the chromatogram to the vapors of hydrogen halides, to nitric acid fumes [4], to ammonia or oxides of nitrogen [2] in suitable reaction chambers [10]. Ammonium hydrogen carbonate, first proposed by SEGxmA and Gono is also suitable [11]. 

Decontamination of the treated samples with mixture of air and vaporized ammonia was conducted in a thermal chamber (fig. 3) with flows of purified dry air and evaporated ammonia through desorbers. Ammonia was produced form crystalline ammonium hydrogen carbonate. An evaporator filled with a 10% solution of hydrogen carbonate is heated to 80°C and subsequently assembled to the system for purified dry air. 

Methylene chloride is easily reduced to methyl chloride and methane by alkaU metal ammonium compounds in Hquid ammonia. When the vapor is contacted with reduced nickel at 200°C in the presence of excess hydrogen, hydrogen chloride and elementary carbon are produced. Heating with alcohoHc ammonia at 100—125°C results in hexamethylenetetramine, (CH2) N4, a heterocycHc compound with aqueous ammonia at 200°C, hydrogen chloride, formic acid, and methylamine are produced. 

Ammonium cyanide may be prepared in solution by passing hydrogen cyanide into aqueous ammonia at low temperatures. It may also be prepared from barium cyanide and ammonium sulfate, or calcium cyanide with ammonium carbonate. It may be prepared in the dry state by gentiy heating a mixture of potassium cyanide or ferrocyanide and ammonium chloride, and condensing the vapor in a cooled receiver. Ammonium cyanide is soluble in water or alcohol. The vapor above soHd NH CN contains free NH and HCN, a very toxic mixture. 

Copper does not form protective oxide fdms. Therefore, its corrosion resistance is poor against most acids and salts. Many gases-haloids, sulfurous anhydride, sulfur vapors, hydrogen sulfide, carbon dioxide, ammonium-destroy copper. However, copper is highly corrosion resistant to alkali solutions. 

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. 

Violent reactions with ammonium salts, chlorate salts, beryllium fluoride, boron diiodophosphide, carbon tetrachloride + methanol, 1,1,1-trichloroethane, 1,2-dibromoethane, halogens or interhalogens (e.g., fluorine, chlorine, bromine, iodine vapor, chlorine trifluoride, iodine heptafluoride), hydrogen iodide, metal oxides + heat (e.g., beryllium oxide, cadmium oxide, copper oxide, mercury oxide, molybdenum oxide, tin oxide, zinc oxide), nitrogen (when ignited), silicon dioxide powder + heat, polytetrafluoroethylene powder + heat. 

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