- Copper(II) acetate,
also referred to as cupric acetate, is the chemical compound with
the formula Cu(OAc)2 where OAc is acetate (CH3CO2-).
- 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(OAc)2(H2O)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.
- 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.
- Copper forms two
series of compounds: copper (I/cuprous) and copper (II/cupric)
compounds. Three of the most common copper compounds are copper (II)
acetate (CAS 142-71-2), copper (II) chloride (CAS 7447-39-4), and
copper (I) cyanide (CAS 544-92-3).
- Copper acetate takes
the form of dark green, monoclinic crystals. It is used as a
fungicide, catalyst for organic reactions, pigment for ceramics,
insecticide, mildew preventive, preservative for cellulosic
materials, stabilizer for polyurethanes and nylons, corrosion
inhibitor, and fuel additive.
- It is used in textile
dyeing, anti-fouling paints, electrolysis and electroplating
processes, flameproofing, printing and photocopying, and
pyrotechnics. It is also used as a "shark chaser," or repellent,
developed as part of survival equipment for military personnel who
fly over shark-infested waters.
- Copper acetates are
used as an intermediate in the manufacture of Paris green (cupric
aceto-arsenite); as a catalyst in a number of organic reactions
including rubber ageing; as a chemical in textile dyeing; and as a
pigment for ceramics.
- Copper acetates have
also been used for impregnating kraft paper to produce an
anti-tarnish wrapping paper for high grade silver ware.
- It has been previously
found in our laboratory that copper complex LHRH (as well as copper
acetate introduced into the lateral brain ventricle) displayed
convulsive effects in rats.
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