ACETANILIDOBENZIMIDAZOLONE AZO PIGMENT AND METHOD FOR PRODUCING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide an acetanilidobenzimidazolone azo pigment which has a red hue and needs not making use of a different red pigment if used for a red hue; and a method for producing the same. SOLUTION: The acetanilidobenzimidazolone azo pigment comprises having a red hue and a metamorph of crystallinity different from that of an acetanilidobenzimidazolone azo pigment having a yellow hue. The method for producing the acetanilidobenzimidazolone azo pigment having a red hue comprises pouring the sulfuric acid solution of an acetanilidobenzimidazolone azo pigment having a yellow hue into water under stirring.