phthal·o·cy·a·nine 
(thăl′ō-sīə-nēn′, fthăl′-)
(thăl′ō-sīə-nēn′, fthăl′-)n.
A stable blue-green porphyrin-based organic dye, C32H18N8, or any of several blue-green derivatives containing chelated metals, used in enamels, printing inks, linoleum, and plastics.
[PHTHAL(IC) + CYANINE.]