Essigsäure, Kupfer(II)-Salz Chemische Eigenschaften,Einsatz,Produktion Methoden
R-Sätze Betriebsanweisung:
R22:Gesundheitsschädlich beim Verschlucken.
R36/37/38:Reizt die Augen, die Atmungsorgane und die Haut.
R50/53:Sehr giftig für Wasserorganismen, kann in Gewässern längerfristig schädliche Wirkungen haben.
S-Sätze Betriebsanweisung:
S26:Bei Berührung mit den Augen sofort gründlich mit Wasser abspülen und Arzt konsultieren.
S60:Dieses Produkt und sein Behälter sind als gefährlicher Abfall zu entsorgen.
S61:Freisetzung in die Umwelt vermeiden. Besondere Anweisungen einholen/Sicherheitsdatenblatt zu Rate ziehen.
Beschreibung
Copper (II) acetate, also referred to as cupric acetate, is the chemical compound with the formula Cu(OAc)2
2 where OAc
- is acetate (CH
3CO
2-). The hydrated derivative, which contains one molecule of water for each Cu atom, is available commercially. Anhydrous Cu(OAc)2 is a dark green crystalline solid, whereas Cu
2(OAc)
4(H
2O)
2 is more bluish-green. Since ancient times, copper acetates of some form have been used as fungicides and green pigments. Today, copper acetates are used as reagents for the synthesis of various inorganic and organic compounds. Copper acetate, like all copper compounds, emits a blue-green glow in a flame.
Chemische Eigenschaften
Cupric acetate is a greenish Blue powder or small crystals.
History
Copper (II) acetate was historically prepared in vineyards, since acetic acid is a byproduct of fermentation. Copper sheets were alternately layered with fermented grape skins and dregs left over from wine production and exposed to air. This would leave a blue substance on the outside of the sheet. This was then scraped off and dissolved in water. The resulting solid was used as a pigment, or combined with arsenic trioxide to form copper acetoarsenite, a powerful insecticide and fungicide called Paris Green or Schweinfurt Green.
During the Second World War copper acetate was used as shark repellent . Under war conditions, before adoption it has been tested only very briefly (while in general successfully). The source says copper acetate does repel sharks in some situations but not in all.
Verwenden
Used as a catalyst or oxidizing agent in organic syntheses
Application
The uses for copper (II) acetate are more plentiful as a catalyst or oxidizing agent in organic syntheses. For example, Cu
2(OAc)
4 is used to couple two terminal alkynes to make a 1,3-diyne:
Cu
2(OAc)
4 + 2 RC ≡ CH → 2 CuOAc + RC ≡ C-C ≡ CR + 2 HOAc
The reaction proceeds via the intermediacy of copper(I) acetylides, which are then oxidized by the copper(II) acetate, releasing the acetylide radical. A related reaction involving copper acetylides is the synthesis of ynamines, terminal alkynes with amine groups using Cu
2(OAc)
4.
Allgemeine Beschreibung
A blue-green crystalline solid. The primary hazard is the threat to the environment. Immediate steps should be taken to limit its spread to the environment. Cupric acetate is used as an insecticide, in the preparation of other chemicals, as a fungicide, and mildew preventive.
Air & Water Reaktionen
Water soluble.
Reaktivität anzeigen
Salts, basic, such as Cupric acetate, are generally soluble in water. The resulting solutions contain moderate concentrations of hydroxide ions and have pH's greater than 7.0. They react as bases to neutralize acids. These neutralizations generate heat, but less or far less than is generated by neutralization of the bases in reactivity group 10 (Bases) and the neutralization of amines. They usually do not react as either oxidizing agents or reducing agents but such behavior is not impossible.
Health Hazard
Inhalation of dust causes irritation of throat and lungs. Ingestion of large amounts causes violent vomiting and purging, intense pain, collapse, coma, convulsions, and paralysis. Contact with solutions irritates eyes; contact with solid causes severe eye surface injury and irritation of skin.
Brandgefahr
Special Hazards of Combustion Products: Irritating vapors of acetic acid may form in fires.
Sicherheitsprofil
Poison by
subcutaneous and intraperitoneal routes.
Moderately toxic by ingestion.
Experimental reproductive effects. When
heated to decomposition it emits acrid
smoke and irritating fumes. See also
COPPER COMPOUNDS.
mögliche Exposition
Cupric acetate is used as a fungicide, as a catalyst for organic reactions; in textile dyeing and as a pigment for ceramics.
Versand/Shipping
UN3077 Environmentally hazardous substances, solid, n.o.s., Hazard class: 9; Labels: 9-Miscellaneous hazardous material, Technical Name Required.
läuterung methode
Recystallise it twice from warm dilute acetic acid solutions (5mL/g) by cooling. [Beilstein 2 IV 111.]
Inkompatibilitäten
Forms explosive materials with acetylene gas, ammonia, caustic solutions; sodium hypobromite; notromethane. Keep away from chemically active metals; strong acids; nitrates. Decomposes above 240C forming acetic acid fumes
Waste disposal
Copper-containing soluble wastes can be concentrated through the use of ion exchange, reverse osmosis, or evaporators to the point where copper can be electrolytically removed and sent to a reclaiming firm. If recovery is not feasible, the copper can be precipitated through the use of caustics and the sludge deposited in a chemical waste landfill.
Essigsäure, Kupfer(II)-Salz Upstream-Materialien And Downstream Produkte
Upstream-Materialien
Downstream Produkte
N,N,N',N'-Tetramethylbut-2-enylendiamin
Nabumetone
3-(Methylthio)butanal
Dye-fixing agent M
Oxin-kupfer
2-((3-(Trifluormethyl)phenyl)-amino)benzoesäure
D-Streptamin, O-3-Deoxy-4-C-methyl-3-(methylamino)-β-L-arabinopyranosyl-(1-6)-O-[2,6-diamino-2,3,4,6-tetradeoxy-α-D-glycero-hex-4-enopyranosyl-(1-4)]-2-deoxy-N1-ethyl-, Sulfat (2:5) (Salz)
9,10-Anthracendion, 1,4-Diamino-, N,N'-gemischte 2-Hydroxyethyl und Methylderivate
4,6-Dimethylpyrimidine-5-carboxylic acid
2,6-Dimethylheptan-3,5-dion
4-Formyl-2-methoxyphenylacetat
meso-Tetrakis(4-chlorophenyl)porphyrin-Cu(II)
Thioacetanilid
2-methyl oxazole 4-ethyl ester
2-Iodo-4-nitroaniline
