Phthalocyanine is an intensely blue-green coloured aromatic macrocyclic compound that is widely used in dyeing. Phthalocyanines form coordination complexes with most elements of the periodic table. These complexes are also intensely colored and also are used as dyes or pigments.
Read more about Phthalocyanine: Properties, History, Synthesis, Applications, Toxicity and Hazards, Related Compounds