Revised and updated, this highly acclaimed work remains the most comprehensive source of information on organic pigments in its fourth edition. It provides current information on synthesis, structures, physical and chemical properties, testing methods, and applications of all industrially produced organic pigments available on the global market. The fourth edition has been completely revised and expanded. The chapter on product safety and legislation regarding organic pigments has been rewritten to reflect current developments. All azo pigments are now presented in their correct hydrazone tautomer form. Since the properties of pigments heavily depend on their crystal structures, for the first time, all available information on the crystal structures of all industrial organic pigments has been compiled, including unpublished data from the authors' own research.