ANTHRAPYRIDONE COMPOUND OR SALT THEREOF, MAGENTA INK COMPOSITION, AND COLORED MATERIAL

摘要

Disclosed is a magenta dye (an anthrapyridone compound or a salt thereof) which is highly soluble in water, has a color and clarity suitable for inkjet recording, and enables the production of a recorded matter having excellent fastness including excellent light resistance and excellent gas resistance. Also disclosed is an ink composition comprising the magenta dye. The anthrapyridone compound is represented by formula (1). In the formula, X represents an pyridine ring, or the like; R1 represents a hydrogen atom, or the like; R2 represents an alkyl group, or the like; R3 represents an unsubstituted alkyl group, or the like; and a to e independently represent a substitution position for a sulfo group or a sulfonyl group having a group R3 of which the substitution position is not specified.