542-62-1 barium cyanide

Cesium was first produced ia the metallic state by electrolysis of a molten mixture of cesium and barium cyanides (2). Subsequentiy the more common thermochemical—reduction techniques were developed (3,4). There were essentially no iadustrial uses for cesium until 1926, when it was used for a few years as a getter and as an effective agent ia reduciag the electron work function on coated tungsten filaments ia radio tubes. Development of photoelectric cells a few years later resulted ia a small but steady consumption of cesium and other appHcations for cesium ia photosensing elements followed. 

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. 

Aininopolycarboxylic acids Barium cyanide P-ainines Cyanuric chloride Diaininoinaleonitrile Lactic acid Methionine Sodium cyanide... 

Cyan-Mthert m. cyanic ester. -Mthyl, n. ethyl cyanide, -bad, n. cyanide bath. -baryum,n. barium cyanide, -benzol, n. cyanobenzene. -bromid, n. cyanogen bromide, -calcium, n. calcium cyanide, -chlorid, n. cyanogen chloride. -doppelsalZt n. double cyanide. 

Inorganic cyanides Barium cyanide, calcium cyanide, cyanogen chloride, silver cyanide... 

Barium cyanide and barium cyanamide from barium carbonate, carbon and nitrogen at about 1400°C. (15). 

Ca(CN)2 + (NH4)2C03 2NH4CN + CaC03 or barium cyanide and ammonium sulfate ... 

When heated with nitrogen in the presence of carbon, it forms barium cyanide ... 

Barium cyanide is used in electroplating and other metallurgical processes. 

Barium cyanide is prepared by reacting barium hydroxide with hydrocyanic acid ... 

Elemental composition Ba 72.52%, C 12.68%, N 14.79%. Barium metal can be analyzed by various instrumental and wet methods (see Barium). Cyanide ion in the aqueous solution of the compound may be determined by using a cyanide ion-specific electrode or by colorimetry using pyridine-barbituric acid reagent (APHA, AWWA, and WEF. 1999. Standard Methods for the Examination of Water and Wastewater, 20th ed., Washington, DC American Public Health Association). 

Barium cyanide is a deadly poison. Ingestion of a small amount can cause death. 

Although Bunsen succeeded in isolating rubidium (42), he observed cesium only by means of its spectral lines (41). Twenty years later Dr. Carl Setterberg succeeded in isolating cesium by electrolysis of the cyanide in presence of barium cyanide. The electrolytic part of the research was performed in Bunsen s laboratory. 

Barium cyanamide, BaCN2, formed in a mixture with barium cyanide, [CAS 542-62-1], BaiCN)2, by heating banum carbide at 800°C with nitrogen gas. Fusion of the cyanamide-cyanide mixture with sodium carbonate converts it entirely to cyanide. 

The muin source of cesium is camallite KCI MgCL 6H1O which contains a small percentage of cesium compounds. See also Camallite. Cesium also occurs in pollucile (cesium aluminosilicaie, 35% Cs 0) and lepidolite (lithium aluminosilicaie). See also Lepidolite and Pollucile. In early processes, cesium metal was obtained by the reduction of cesium salts, such as Ihe hydroxide or chloride. In current practice, the metal is produced by electrolyzing the cyanide. The latter compound usually is fused cesium barium cyanide mixture. 

In 1895, Frank and Caro found that when barium carbide was heated to redness in air the main product was barium cyanide, but simultaneously a certain amount of barium cyanamide was formed. These two reactions, therefore, proceeded side by side ... 

A process patented in 1903 by the Ampere Electro-Chemical Co. (U.S. patent 719223) for the preparation of barium cyanide aud acetoue is as follows ... 

EPA has identified 1,177 NPL sites. Barium has been found at 154 of the total number of sites evaluated for barium. Barium cyanide and barium carbonate have also been found at 1 and 8 sites, respectively (View 1989). However, we do not know how many of the 1,177 sites have been evaluated for barium, barium cyanide, or barium carbonate. As more sites are evaluated by EPA, these numbers may change. The frequency of these sites within the United States can be seen in Figure 5-1. 

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