Phthalocyanine

Name:
Phthalocyanine
Detailed information:
Four commercially important modifications are (1) metal-free phthalocyanine, (C₆H₄C₂N)₄N₄, having a blue-green color (structure shown below): (2) copper phthalocyanine, in which a copper atom is held by secondary valences of the isoindole nitrogen atoms (see Pigment Blue 15); (3) chlorinated copper phthalocyanine, green, in which 15−16 hydrogen atoms are replaced by chlorine (see Pigment Green 7); and (4) sulfonated copper phthalocyanine, water soluble, green, in which two hydrogen atoms are replaced by HSO₃ groups.

Chemistry structure:
Use:
Decorative enamels, automotive finishes, and similar applications where lightfastness and chemical stability are required.