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1.  Overview     2. History of use     3. Making the pigment     4. Technical details

About the chemical structure:          Chemical name: Copper(II)-acetoarsenite Formula: Cu(CH3COO)2 · 3 Cu(AsO2)2 Crystal system: monoclinic Refractive index: alpha = 1.71-2, beta = 1.77-8

How can you identify Emerald green?          Chemical identification: Microscopically, it appears as small rounded grains that are uniform in size making it readily distinguishable from Scheele's green. At high magnification, the grains are radial in structure and a dark spot can be seen in the center. It can be identified chemically by the stannous chloride test described for Scheele's green and has the same reaction for arsenic. In potassium hydroxide, it turns into an ochre color and in weak sulfuric acid it dissolves and turns blue Spectra: Raman spectra (at University College London), (pdf file download; at University of Florence, Italy)   Usage and handling:          Permanence: Toxicity: medium very toxic   Literature:             Artists’ Pigments. A Handbook of Their History and Characteristics, Vol. 3: E.W. Fitzhugh (Ed.) Oxford University Press 1997, p. 219-271 Andreas, H.Schweinfurter Grün, Chemie in unserer Zeit, 30, 1996 p. 23 Schweizer, F. und Mühletaler, B. Einige Grüne und Blaue Kupferpigmente, Farbe und Lack, 74 1968, p. 1159-73

Other greens         (intro) - Cobalt green - copper resinate - Emerald green - Green earth - malachite       verdigris - viridian