The most vivid, brilliant green pigment in an artist's palette, it is copper aceto-arsenite, which makes it dangerous because it is poisonous. Under the name of Paris Green, it has been used as an insecticide. For an artist, it is unpredictable because mixed with some colors, it can cause everything to turn brown and ultimately to fade. Emerald Green is known in Europe as "Schweinfurt" green for the German town where it was invented by F.W. Russ and Wilhelm Sattler in 1814. Two years later it was on the market. Source: Ralph Mayer, "A Dictionary of Art Terms and Techniques"<br><br>A particular green pigment.Related resource: Pigments through the Ages on emerald green.