[met-l-free] 
[thal-uh-sahy-uh-neen, -nin, fthal-] | 1. | Also called metal-free phthalocyanine. a blue-green pigment, C3 2H1 8N8, 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, esp. copper: used chiefly in the manufacture of enamels, printing inks, and automotive finishes. |
phthalocyanine phthal·o·cy·a·nine (thāl'ō-sī'ə-nēn')
n.
Any of several stable, light-fast, blue or green organic pigments used in enamels and plastics.
lˌfri