Organic pigments quinacridones

The most important class of organic pigments in terms of production are the azo pigments. Other important pigment classes include metal-complex pigments (e.g., copper phthalocyanine) and higher polycyclic compounds (e.g., anthraquinone, quinacridone, isoindolinone, and perylene). 

Phthalocyanine and quinacridone belong to organic pigments, which are commonly used for the coloration of polypropylene fibres. The chemical formulae of pigments are presented in Figure 1. 

Major suppliers of organic pigments include Akrochan, BASE Corp., and Hoechst Celanese Corp. (azos) Cabot Corp., Holland Colors Americas Inc., and Mineral Pigments Corp. (carbon black) BASF Corp., Hoechst Celanese and Sandoz Chemicals (dioxazines) BASF Corp., Ciba-Giegy Corp. and Indol Div. Magruder Color (isoindolinones) BASF Corp., Daicolor-Pope Inc., and Harwick Chemical Corp. (phthalocyanines) Hoechst Celanese Corp, Holland Colors Americas Inc., and Keystone Aniline Corp. (quinacridones) BASF Corp, and Compton Knowles Corp. (quinophthalones) and Fabricolor Inc., Hoechst Celanese Crop, and Summit Chemical Co. (vats). 

There is a large number of organic pigments. They are carbon black,s, phthalo-cyanines, quinacridones, perylenes, basic and acid colorants, anthraquinones, diazines, isoindolidones, azo and azo condensation pigments [2,10]. 

---