Copper, arsenite chlorids

Copper compounds are used routinely and widely to control freshwater snails that serve as intermediate vectors of schistosomiasis and other diseases that afflict humans (Hasler 1949 NAS 1977 Rowe and Prince 1983 Winger etal. 1984 Al-Sabri etal. 1993). These compounds include copper sulfate, copper pentachlorophenate, copper carbonate, copper-tartaric acid, Paris green (copper arsenite-acetate), copper oxide, copper chloride, copper acetyl acetonate, copper dimethyl dithiocar-bamate, copper ricinoleate, and copper rosinate (Cheng 1979). Also, many species of oyster enemies are controlled by copper sulfate dips. All tested species of marine gastropods, tunicates, echinoderms, and crabs that had been dipped for 5 seconds in a saturated solution of copper sulfate died if held in air for as little as a few seconds to 8 h mussels, however, were resistant (MacKenzie 1961). 

Cumene Hydroperoxide Copper Acetate Copper Arsenite Copper Bromide Copper Chloride Copper Fluoioborate Copper Arsenite Copper Cyanide Copper Nitrate Copper Oxalate Copper Sulfate... 

Commercial methods of producing copper arsenate consist in heating copper arsenite at 600° to 700° C. in an oxygen-enriched atmosphere,3 or in heating basic copper chloride with an arsenate or arsenic acid.4... 

Water-soluble inorganic salts acid copper chromate ammoniacal copper arsenite chromated copper arsenate chromated zinc chloride fluor chrome arsenate phenol... 

Copper is an essential element, being active in many enzymes and hemocyanin. Copper is an essential nutrient element to animals and plants. However, high Cu accumulation in animals and plants can be toxic. Copper is found in three oxidation states including cupric (+2), cuprous (+1), and elemental Cu (0). Cu+ and Cu + are the most important forms and are involved in oxidation-reduction reactions in soils and sediments (Figure 12.7). Cu+ and Cu + can exist in aqueous systems, although the latter is much more dominant. Copper is widely distributed in nature in its elemental state and in the form of sulfide, arsenite, chloride, and carbonates. The earth s crust on an average contains approximately 50 ppm copper. Soil and sediment contain approximately... 

Waterborne Salts. Waterborne salts for wood preservation include zinc chloride, chro-mated zinc chloride, copperized chromated zinc chloride, zinc meta arsenite, chromated zinc arsenate, chromated copper arsenate, ammoniacal copper arsenite, acid copper chromate, and fluor chrome arsenate phenol. These chemicals leave little odor and have little effect on the appearance of the wood, which may also be painted. The zinc chloride salts, at high penetrations, also provide fire retardance.Wood should be reseasoned before use because this type of chemical treatment injects a large amount of water into the wood. 

Cobalt Niuate Cobalt Nitrate Cobalt Sulfate Cobalt Sulfate Oils Edible Coconut Oils Edible Coconut Oil Resin Oil Rozin Collodion Ethyl Alcohol Methyl Alcohol Methyl Alcohol Methylcyclopentadienyl-manganese Tricarbonyl Polyphosphoric Acid Copper Acetate Copper Acetoarsenite Copper Arsenite Ferrous Sulfate Copper Pluoroborate Copper Bromide Copper Chloride Copper Cyanide Copper Pluoroborate... 

Acid copper chromate Ammoniacal copper arsenite Chromated copper arsenate Chromated zinc chloride Fluor chrome arsenate phenol... 

Phenylarsonic acid may be obtained from the reaction between phenyl-diazonium chloride and sodium arsenite in the presence of a trace of copper sulphate ... 

The conversion of an aromatic diazonium compound into the corresponding arsonic acid by treatment with sodium arsenite in the presence of a catalyst, such as copper or a copper salt, is called the Bart reaction. A modification of the reaction employs the more stable diazonium fluoborate in place of the diazonium chlorid.i. This is illustrated by the preparation of />-nitrophenylarsonic acid ... 

Concurrently with the preparation of the phenyldiazonium chloride solution, prepare a cold suspension of sodium arsenite. Place 250 ml. of water in a 3-htre round-bottomed flask equipped with a mechanical stirrer. Heat the water to boding, add 125 g. of anhydrous sodium carbonate, and, as soon as the carbonate has dissolved, introduce 62 5 g. of pure arsenious oxide and 3 g. of crystallised copper sulphate with stirring. When all the solids have dissolved, cool the solution with stirring under a stream of tap water until the temperature has fallen to 15°. 

Tri-copper Di-arsenide, Cu3As2, is formed when arsine acts on a solution of copper sulphate,17 or on dry copper sulphate or chloride 18 by subjecting a suitable mixture of the powdered elements to a pressure of 6500 atm. 19 by reducing cupric arsenite with fused potassium... 

Thirteen grams of sodium metaarsenite and 1 g. of copper sulfate are dissolved in 300 cc. of water. This solution is stirred during the entire course of the arsonation. In small portions, the mixture of solid fluorene-diazonium chloride and its saturated solution is added to the arsenite at room temperature. At once a vigorous evolution of nitrogen occurs. Sufficient 6 N sodium hydroxide solution is added from time to time to make this arsenite solution just alkaline. When all the diazo compound... 

In general, the Rosenmund reaction is carried out by heating one mole of trisodium or tripotassium arsenite with one mole of aromatic halide in boiling aqueous ethanol solution. Certain minor modifications of this procedure have been employed. If the aromatic halide contains an addic group (e.g., o-bromophenylarsonic add), no ethanol is necessary.82 Copper powder, as well as cuprous chloride, is sometimes employed as catalyst, but the value of either is uncertain.82- 86 Reactions of bromo-benzene and p-br omo acetophepo ne must be run in sealed tubes at temperatures of 150-2000.88 87 82... 

Bart reaction. (Scheller modification Star-key modification). Formation of aromatic arsonic acids by treating aromatic diazonium compounds with alkali arsenites in the presence of cupric salts or powdered silver or copper in the Scheller modification, primary aromatic amines are diazotized in the presence of arsenious chloride and a trace of cuprous chloride. 

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