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phthalocyanine

[ thal-uh-sahy-uh-neen, -nin, fthal- ]

noun

, Chemistry.
  1. Also called metal-free phthalocyanine. a blue-green pigment, C 3 2 H 1 8 N 8 , derived from phthalic anhydride.
  2. any of the group of blue or green pigments produced by the interaction of metal-free phthalocyanine and a metal, especially copper: used chiefly in the manufacture of enamels, printing inks, and automotive finishes.


phthalocyanine

/ ˌfθæl-; ˌθæləʊˈsaɪəˌniːn; ˌθeɪ- /

noun

  1. a cyclic blue-green organic pigment. Formula: (C 6 H 4 C 2 N) 4 N 4 H 4
  2. any of a class of compounds derived by coordination of this compound with a metal atom. They are blue or green pigments used in printing inks, plastics, and enamels
“Collins English Dictionary — Complete & Unabridged” 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012


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Word History and Origins

Origin of phthalocyanine1

First recorded in 1930–35; (na)phthal(ene) + -o- + cyanine
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Word History and Origins

Origin of phthalocyanine1

C20: from phthal- (see phthalein ) + cyanine

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