Nickel azo green
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Description
1) A yellow-green, lightfast, chloroaniline dye complexed with nickel. Nickel azo green was developed after World War II by Woodward and Kvalnes at DuPont. It was introduced under the brand name Green Gold starting in 1947. Nickel azo green has been used as an artists pigment.
2) Common variation that have also been called Nickel azo green are PY129 (sold as Irgazin yellow, Azo Green, Green Gold) and PY150 (sold as Nickel Azo Yellow, and Nickel Azo).
Synonyms and Related Terms
1) Pigment Green 10; CI 12775; Green Gold; nickel green yellow; nickel azo dark
2) Pigment Yellow 129 (CI 48042); Pigment Yellow 150 (CI 12764)
Risks
- Carcinogenic.
Physical and Chemical Properties
For description 1:
- Dissolves in concentrated sulfuric acid to give orange/brown solution.
- Composition = C30H18O4N6Cl2Ni
Resources and Citations
- M.de Keijzer, "Microchemical Analysis on Synthetic Organic Artists Pigments Discovered in the Twentieth Century" ICOM Dresden 1990, p. 221-225.
- Reed Kay, The Painter's Guide To Studio Methods and Materials, Prentice-Hall, Inc., Englewood Cliffs, NJ, 1983
- Monona Rossol, The Artist's Complete Health and Safety Guide, Allworth Press, New York, 1994
- B. Berrie, S.Q. Lomax, 'Azo Pigments: Their History, Synthesis, Properties and Use in Artists' Materials', Studies in the History of Art , National Gallery of Art, Washington DC, No. 57, 1997
- Artist Pigments.org: Nickel Azo Green