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Verdigris is a collective term for copper acetate, whose chemical varieties produce different hues. The technical literature is inconsistent in describing these variations. Some sources refer to "neutral verdigris" as copper(II) acetate monohydrate (Cu(CH 3 CO 2) 2 ·(H 2 O)) and to "blue verdigris" as Cu(CH 3 CO 2) 2 ·CuO·(H 2 O) 6. [17]
"Basic copper acetate" is prepared by neutralizing an aqueous solution of copper(II) acetate. The basic acetate is poorly soluble. This material is a component of verdigris , the blue-green substance that forms on copper during long exposures to atmosphere.
Verdigris – Carbonate of Copper or (more recently) copper(II) acetate. The carbonate is formed by weathering copper. The acetate is formed by vinegar acting on copper. One version was used as a green pigment. White arsenic – arsenious oxide, formed by sublimating arsenical soot from the roasting ovens.
The verdigris which formed was scraped off each week. [6] In the 19th century and earlier, the pigment was also made by hanging copper plates over hot vinegar in a sealed pot until a green crust formed on the copper. [6] Today it is usually made by treating Copper(II) hydroxide with acetic acid. [7]
Verdigris is a common term for copper(II) acetate, the green patina that forms on copper, brass and bronze, and which is used as a pigment. Verdigris may also refer to: Verdigris, Oklahoma; Verdigris, a Doctor Who novel; Verdigris, a play by Jim Beaver; Verdigris agaric, common name for the fungus Stropharia aeruginosa
Copper usnate; Copper(II) acetate; Copper(II) arsenate; Copper(II) azide; ... Verdigris This page was last edited on 3 July 2024, at 19:12 (UTC). Text is ...
The vivid green color of copper(II) acetate made this form of verdigris a much used pigment. Until the 19th century, verdigris was the most vibrant green pigment available and was frequently used in painting. Verdigris was sometimes used to illustrate cyan colors in early color wheels. [34]
Copper toxicity (or Copperiedus) is a type of metal poisoning caused by an excess of copper in the body. Copperiedus could occur from consuming excess copper salts, but most commonly it is the result of the genetic condition Wilson's disease and Menke's disease, which are associated with mismanaged transport and storage of copper ions.