Difference between revisions of "Copper acetate, basic"
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== Description == | == Description == | ||
| − | A blue green crystalline powder called [ | + | A blue green crystalline powder called [[verdigris]]. Basic copper acetate has been prepared since ancient times by exposing copper to vapors of fermenting grape skin solutions. It is a complex compound that contains cupric acetate, cupric hydroxide and water in varying proportions. Common verdigris, or green verdigris, has the proportions of 2:1:5 (cupric acetate: cupric hydroxide:water) while French verdigris, or blue verdigris, has the proportions of 1:1:5, respectively. When combined with terpenoid resins, such as [[Venice turpentine]], verdigris forms [[copper resinate]]. Verdigris is also used as a pesticide, fungicide, catalyst, textile dye and pigment for paints, ceramics. |
Note: The term verdigris is also commonly, but incorrectly, applied to any blue-green patina formed on outdoor copper. | Note: The term verdigris is also commonly, but incorrectly, applied to any blue-green patina formed on outdoor copper. | ||
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== Synonyms and Related Terms == | == Synonyms and Related Terms == | ||
| − | verdigris | + | verdigris; copper acetate hydrate; acetato básico de cobre (Esp.); cardenillo (Esp.); acetate de cuivre (Fr.); acetato di rame basico (It.); acetato básico de cobre (Port.); copper subacetate; common verdigris; green verdigris; French verdigris; blue verdigris |
| − | == | + | == Risks; == |
| + | |||
| + | * Toxic by ingestion. | ||
| + | * May turn brown or black in contact with air. | ||
| + | * SigmaAldrich: [https://www.sigmaaldrich.com/US/en/product/aldrich/341746 SDS] | ||
| + | ==Physical and Chemical Properties== | ||
Soluble in acids and ammonia. Slightly soluble in ethanol, water. | Soluble in acids and ammonia. Slightly soluble in ethanol, water. | ||
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| − | == | + | ==Resources and Citations== |
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* Richard S. Lewis, ''Hawley's Condensed Chemical Dictionary'', Van Nostrand Reinhold, New York, 10th ed., 1993 | * Richard S. Lewis, ''Hawley's Condensed Chemical Dictionary'', Van Nostrand Reinhold, New York, 10th ed., 1993 | ||
Latest revision as of 12:46, 4 July 2022
Description
A blue green crystalline powder called Verdigris. Basic copper acetate has been prepared since ancient times by exposing copper to vapors of fermenting grape skin solutions. It is a complex compound that contains cupric acetate, cupric hydroxide and water in varying proportions. Common verdigris, or green verdigris, has the proportions of 2:1:5 (cupric acetate: cupric hydroxide:water) while French verdigris, or blue verdigris, has the proportions of 1:1:5, respectively. When combined with terpenoid resins, such as Venice turpentine, verdigris forms Copper resinate. Verdigris is also used as a pesticide, fungicide, catalyst, textile dye and pigment for paints, ceramics.
Note: The term verdigris is also commonly, but incorrectly, applied to any blue-green patina formed on outdoor copper.
Synonyms and Related Terms
verdigris; copper acetate hydrate; acetato básico de cobre (Esp.); cardenillo (Esp.); acetate de cuivre (Fr.); acetato di rame basico (It.); acetato básico de cobre (Port.); copper subacetate; common verdigris; green verdigris; French verdigris; blue verdigris
Risks;
- Toxic by ingestion.
- May turn brown or black in contact with air.
- SigmaAldrich: SDS
Physical and Chemical Properties
Soluble in acids and ammonia. Slightly soluble in ethanol, water.
| Composition | Cu(C2H3O2).CuO(OH)2 |
|---|---|
| Refractive Index | 1.53; 1.56 |
Resources and Citations
- Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
- The Merck Index, Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: entry #2691
- R. J. Gettens, G.L. Stout, Painting Materials, A Short Encyclopaedia, Dover Publications, New York, 1966
- Dictionary of Building Preservation, Ward Bucher, ed., John Wiley & Sons, Inc., New York City, 1996
- Susan E. Schur, Conservation Terminology: A review of Past & Current Nomenclature of Materials, Technology and Conservation, Spring (p.34-39); Summer (p.35-38); Fall (p.25-36), 1985