An azo pigment represented by the following formula (1) or a tautomer thereof:
wherein R1 represents an aliphatic group having 1 to 8 carbon atoms in total, an aryl group having 6 to 12 carbon atoms in total or a heterocyclic group having 2 to 12 carbon atoms in total; R2 represents a hydrogen atom or an aliphatic group having 1 to 8 carbon atoms in total; R3 represents a hydrogen atom, an aliphatic group having 1 to 4 carbon atoms in total, an aliphatic amino group having 1 to 8 carbon atoms in total, or an amino group; R4 and R5 each independently represent an aliphatic amino group having 1 to 8 carbon atoms in total, or an amino group; R6 represents a cyano group, a carbamoyl group having 1 to 10 carbon atoms in total, an aliphatic oxycarbonyl group having 1 to 8 carbon atoms in total, an aliphatic sulfonyl group having 1 to 8 carbon atoms in total, or a carboxy group; and X2 represents a nitrogen atom or C-CN.
以下是该式(1)表示的偶氮
颜料或其互变异构体:
其中,R1代表总共具有1至8个碳原子的脂肪族基团,总共具有6至12个碳原子的芳基团或总共具有2至12个碳原子的杂环基团;R2代表氢原子或总共具有1至8个碳原子的脂肪族基团;R3代表氢原子、总共具有1至4个碳原子的脂肪族基团、总共具有1至8个碳原子的脂肪族
氨基基团或
氨基基团;R4和R5各自独立地代表总共具有1至8个碳原子的脂肪族
氨基基团或
氨基基团;R6代表
氰基、总共具有1至10个碳原子的
氨基甲酰基团、总共具有1至8个碳原子的脂肪族氧羰基团、总共具有1至8个碳原子的脂肪族磺酰基团或羧基;X2代表氮原子或C-CN。