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phtha·lo·cy·a·nine | \ ˌtha-lō-ˈsī-ə-ˌnēn 
, ˌthā- \
, ˌthā- \Definition of phthalocyanine
: a bright greenish-blue crystalline compound C32H18N8 also : any of several metal derivatives that are brilliant fast blue to green dyes or pigments
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The first known use of phthalocyanine was in 1933
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