Acetate cadmium

Cadmium acetate is a colorant for glass and textiles, a glaze for ceramics where it produces iridescent effects, a starting material for preparation of the cadmium haUdes, and is an alternative to the cyanide bath for cadmium electroplating. In 1991, cadmium acetate dihydrate sold for 59.50/kg in 2 kg lots of reagent-grade material. 

Vapour phase synthesis may be carried out by passing a mixture of acetylene and acetic acid through a reaction tube at 210-215°C. Typical catalysts for this reaction are cadmium acetate, zinc acetate and zinc silicate. The monomer in each of the above mentioned processes is purified by distillation. 

Chemical Designations - Synonyms Cadmium Acetate Dihydrate Chemical Formula ... 

The chemistry of vinyl acetate synthesis from the gas-phase oxidative coupling of acetic acid with ethylene has been shown to be facilitated by many co-catalysts. Since the inception of the ethylene-based homogeneous liquid-phase process by Moiseev et al. (1960), the active c ytic species in both the liquid and gas-phase process has always been seen to be some form of palladium acetate [Nakamura et al, 1971 Augustine and Blitz, 1993]. Many co-catalysts which help to enhance the productivity or selectivity of the catalyst have appeared in the literature over the years. The most notable promoters being gold (Au) [Sennewald et al., 1971 Bissot, 1977], cadmium acetate (Cd(OAc)j) [Hoechst, 1967], and potassium acetate (KOAc) [Sennewald et al., 1971 Bissot, 1977]. 

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... 

CdSe, CdTe. CdSe films have been grown from complexed (with tartaric acid and triethanolamine) cadmium acetate or cadmium sulfate solutions and sodium selenosullale.1272 81 84 The films were amorphous or nanocrystalline with an average crystallite size of 6nm. The optical band gap was 1.8-2.1 eV, and the electrical resistivity was of the order 104-106Qcm. 

Cadmium acetate and sodium tellurite solutions have similarly been used to grow CdTe films by SILAR. The films were polycrystalline (hexagonal), and the grain size was on the order of 22nm (film thickness 272nm). The optical band gap was 1.41 eV.85... 

Dissolve 50 mg cadmium acetate in a mixture of 5 ml DW and 1 ml glacial acetic acid and dilute with ethyl methyl ketone to 50 ml. Immediately before use add and dissolve sufficient Ninhydrin to produce a soln. containing 0.2% w/v. 

Cadmium acetate is used for glazing ceramics and pottery in electroplating haths in dyeing and printing textiles and as an analytical reagent for sulfur, selenium, and tellurium. 

Cadmium acetate is prepared by treating cadmium oxide with acetic acid ... 

Cadmium bromide is prepared by heating cadmium with bromine vapor. Also the compound can be prepared by the treatment of dry cadmium acetate with glacial acetic acid and acetyl bromide. Alternatively, it may be obtained by dissolving cadmium or cadmium oxide in hydrobromic acid and evaporating the solution to dryness under hehum in an inert atmosphere. 

Cadmium chloride also may be prepared by adding dry cadmium acetate to acetyl chloride in glacial acetic acid. 

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