Phthalocyanine green

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Phthalocyanine green


A synthetic organic material composed of chlorinated copper phthalocyanine (chlorinated Phthalocyanine blue). Phthalocyanine blue was introduced as a industrial pigment in 1935 and the green derivative was first sold in 1938. Phthalocyanine green is usually adsorbed on an aluminum hydrate base to form a deep vivid green color that is used as a substitute for viridian. The permanent pigment is unaffected by light, heat, and chemicals. Phthalocyanine green is used as a colorant in inks, paints, chalks, leather, pencils, and photographs.

Synonyms and Related Terms

Pigment Green 7; CI 74260; Phtalocyaningrün (Deut.); vert de phtalocyanine (Fr.); verde de ftalocianina (Esp.); verde ftalo (It.); phtalocyanine groen (Ned.); verde de ftalocianina (Port.); phthalo green; copper phthalocyanine green; Monastral Fast Green; thalo green; Heliogen green; Windsor Green; Talens Green




PG007 Phthalocyanine green.jpg


Phthalocyanine Green.PNG

Other Properties

Insoluble in organic solvents, water and alkalies. Slowly decomposes in strong acids.

Fine grain, rounded, translucent particles with strong birefringence; the color is unchanged with a Chelsea filter

Composition C32H0-2N8Cl14-16Cu
Density 2.1
Refractive Index 1.40

Hazards and Safety

Suspected carcinogen, teratogen. May be contaminated with traces of PCB.


  • Nicholas Eastaugh, Valentine Walsh, Tracey Chaplin, Ruth Siddall, Pigment Compendium, Elsevier Butterworth-Heinemann, Oxford, 2004
  • R. J. Gettens, G.L. Stout, Painting Materials, A Short Encyclopaedia, Dover Publications, New York, 1966
  • Reed Kay, The Painter's Guide To Studio Methods and Materials, Prentice-Hall, Inc., Englewood Cliffs, NJ, 1983
  • Ralph Mayer, A Dictionary of Art Terms and Techniques, Harper and Row Publishers, New York, 1969 (also 1945 printing)
  • Hermann Kuhn, Conservation and Restoration of Works of Art and Antiquities, Butterworths, London, 1986
  • Michael McCann, Artist Beware, Watson-Guptill Publications, New York City, 1979
  • Website address 1 Comment:
  • M. de Keijzer, 'A survey of red and yellow modern synthetic organic artists pigments discovered in the 20th century and used in oil colors', ICOM Preprints Lyons, France, Getty Conservation Institute, Los Angeles, p. 369, 1999

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