Cadmium acetate sulfide

Ethylene glycol has been used instead of water as solvent in the deposition of CdS films from cadmium acetate and sodium sulfide precursors. The films were amorphous and showed some excess cadmium (Cd/S atomic percentage ratio was 52.3/47.7) in EDX analysis.79... 

Three stock solutions are prepared inside an inert (nitrogen) atmosphere glove box as follows A) 0.1M cadmium acetate in 80%methanol and 20% acetonitrile B) 0.1M sodium sulfide in 50% water and 50% methanol C) 0.2M thiophenol in acetonitrile. These stock solutions are mixed together in ratios... 

Sulfide Addition of cadmium acetate or zinc acetate 7 days EPA... 

CADMIUM ACETATE (543-90-8) Incompatible with strong oxidizers, elemental sulfur, selenium, sulfides, tellurium, strong acids, nitrates. 

Preparation of Modified Materials. Materials were prepared by heating the Thiokol or olefin (25% w/w) with purified sulfur at 140 or 170 °C for 3 hr in a nitrogen atmosphere. In the case of dicyclopentadiene, proportions of 5, 10, and 25% w/w were used. Products were poured into pre-heated (40-50 °C) glass dishes and allowed to cool in a desiccator. Liberated hydrogen sulfide from the reaction was trapped in cadmium acetate, and the precipitated cadmium sulfide was determined iodo-metrically. 

Other gases are absorbed and determined by volumetric methods only in special cases. A solution of palladium(II) chloride or colloidal palladium and picric acid absorbs hydrogen, a solution of potassium dichromate is used for sulfur dioxide, and a solution of cadmium acetate or alkaline solution of hydrogen peroxide for hydrogen sulfide. 

Cadmium is a bivalent metal that is used as an anticorrosive and, in association with nickel, copper and silver, in the production of conducting alloys. One of its salts (cadmium sulfide) is used as a colorant for paints and rubber cadmium acetate is used in the production of craftware. There are reports in the literature of cadmium granulomas with a sarcoid-like appearance. Occupational exposure to rare metals has been well reviewed recently (McFadden et al. 1989 Kusaka 1993). The histopathological diagnosis is... 

Hydrogen sulfide in the gaseous products was analyzed by use of a cadmium acetate aq. solution (JIS K 2302-1963). Mercaptans and thiocarbonyl, which may possibly be present in the gaseous products, were not determined. Total sulfur in the liquid products was analyzed by a conventional method. Sulfur in the coke was not analyzed but calculated based on the material balance as to the sulfur. 

The detection of sulfides produced by the fusion of organic compounds with an alkali metal requires the preparation of an acetic acid solution of the fusion residue. Any loss of hydrogen sulfide from the acid solution can be prevented by the addition of cadmium acetate (formation of CdS). 

Cadmium is a transition metal in group IIB of the periodic table of elements. The metal is bluish-white to silver-white. At room temperature, it has a hexagonal close-packed crystal structure. Eight stable isotopes are known to be present in natui . The atomic weight of cadmium is 112.4 and the atomic number 48. The density at 25°C is 8.6 g/cm the melting point 321°C and the boiling point 765°C. The most common oxidation state is +2. " The most important compounds are cadmium acetate, cadmium sulfide, cadmium sulfoselenide, cadmium stearate, cadmium oxide, cadmium carbonate, cadmium sulfate, and cadmium chloride. The acetate, chloride, and sulfate are soluble in water, whereas the oxide and sulfide are almost insoluble. ... 

Carbonate is measured by evolution of carbon dioxide on treating the sample with sulfuric acid. The gas train should iaclude a silver acetate absorber to remove hydrogen sulfide, a magnesium perchlorate drying unit, and a CO2-absorption bulb. Sulfide is determined by distilling hydrogen sulfide from an acidified slurry of the sample iato an ammoniacal cadmium chloride solution, and titrating the precipitated cadmium sulfide iodimetrically. 

The cadmium chalcogenide semiconductors (qv) have found numerous appHcations ranging from rectifiers to photoconductive detectors in smoke alarms. Many Cd compounds, eg, sulfide, tungstate, selenide, teUuride, and oxide, are used as phosphors in luminescent screens and scintiUation counters. Glass colored with cadmium sulfoselenides is used as a color filter in spectroscopy and has recently attracted attention as a third-order, nonlinear optical switching material (see Nonlinear optical materials). DiaLkylcadmium compounds are polymerization catalysts for production of poly(vinyl chloride) (PVC), poly(vinyl acetate) (PVA), and poly(methyl methacrylate) (PMMA). Mixed with TiCl, they catalyze the polymerization of ethylene and propylene. 

Phenylacetamide has been obtained by a wide variety of reactions from benzyl cyanide with water at 250-260° 6 from benzyl cyanide with water and cadmium oxide at 240° 6 from benzyl cyanide with sulfuric acid 7 8 by saturation of an acetone solution of benzyl cyanide with potassium hydrosulfide 9 from benzyl cyanide with sodium peroxide 10 by electrolytic reduction of benzyl cyanide in sodium hydroxide 11 from ethyl phenyl-acetate with alcoholic 12 or aqueous 13 ammonia from phenyl-acetic acid with ammonium acetate 14 or urea 15 from diazoacetophenone with ammoniacal silver solution 16 from phenyl-acetic acid imino ether hydrochloride and water 17 from acetophenone with ammonium poly sulfide at 215° 18 from benzoic acid 19 and by heating the ammonium salt of phenyl-acetic acid.20... 

Pigments and dyes provide paint and ink colors. Many highly toxic pigments, such as copper acetate (blue-green), arsenic trisulfide (yellow), and mercury II iodide (red), are no longer used. However, other hazardous pigment compounds, such as lead carbonate, mercury II sulfide, and cadmium sulfide, are still used today. These compounds present a danger to those artists who use their mouths to make a brush more pointed. 

The synthesis of Mn2+-doped CdS nanocrystals has been studied by several groups. In one such study (82), the doped CdS nanocrystals were prepared by simple mixing of ethylene glycol solutions of cadmium and manganese acetate with a solution of sodium sulfide, followed by washing with methanol and thermal treatment in triethyl phosphate to deagglomerate the particles. Mean... 

Peng er a/.6 "71 have proposed the use of greener Cd sources such as cadmium oxide, carbonate and acetate instead of the dimethylcadmium. These workers suggest that the size distribution of the nanocrystals is improved by the use of hexadecylamine, a long-chain phosphonic acid or a carboxylic acid. The method can be extended to prepare CdS nanoparticles by the use of tri-n-octylphosphine sulfide (TOP-S) and hexyl or telradecyl phosphonic acid in mixture with TOPO-TOP. Hyeon and coworkers71 have prepared nanocrystals of several metal sulfides such as CdS, ZnS, PbS, and MnS with different shapes and sizes by the thermolysis of metal-oleylamine complexes in the presence of S and oleylamine (Fig. 7). 

There have been only a few reports of mesostructured metal sulfides. Mesoporous cadmium sulfide was prepared from polyethylene oxide surfactants and cadmium salts exposed to hydrogen sulfide [35], A study of the effects of the counter-anion on the formation of CdS mesostructures led to the conclusion that the use of cadmium nitrate and perchlorate salts improved the degree of order of the mesostructure over the chloride, sulfate and acetate salts. This effect was attributed to the stronger acidity of conjugate acid by-products of the reaction in the case of nitrates that leads to the dissolution of high-energy defects and enhances structural order. 

C4HsCd04 Noncombustible solid. The solution is basic reacts with acids, producing heat. Incompatible with strong oxidizers, elemental sulfur, selenium, sulfides, tellurium, nitrates. In the heat of fire, toxic cadmium oxide fumes may form. CADMIUM BROMIDE (7789-42-6) CdBrj Noncombustible solid. Hydrolyzes in water, forming cadmium and bromic acid. Reacts with sulfides. Aqueous solution is inconqiatible with potassium. Incompatible with sulhiric acid, alkalis, ammonia, aliphatic amines, alkanolamines, alkylene oxides, amides, epichlorohydrin, organic anhydrides, isocyanates, nitromethane, vinyl acetate. 

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