Paris green

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Paris green,

also called Schweinfurt green, an extremely poisonous, bright green powder that was formerly used extensively as a pigment (e.g., in wallpaper) and that is sometimes used as an insecticide or to kill plant fungi; it must be used with great caution because of its poisonous nature. Chemically it is a copper acetoarsenite that may be prepared from arsenic trioxide and copper acetate.
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References in periodicals archive ?
Paris Green, the common name for cupric acetoarsenite, is an emerald-green powder containing 43% arsenic and was used from 1865 until the 1940s.
Paris Green, who also happens to be 19, takes the lead role.
DESPERATE Ireland fans were crying out for tickets to the World Cup showdown in France yesterday and begged: Let us turn Paris green.
"Paris Green" was an arsenic paint pigment used to kill the Colorado Potato Beetle (and this reviewer is reminded of the "Fire Retardant Green" paint used on her own childhood farm) and while the supersized images of old and new ads are mostly orange perhaps it's that color's position opposite green on the color wheel that evokes a sickening feeling towards the final chapters.
Colors provide the title of each chapter, such as Paris Green, Beguine Blue, Rhinoceros Black, and Lilac Haze, allowing the reader to experience an almost mystical and medieval view of time and place through the prism of color.