ANTHRAPYRIDONE COMPOUND OR SALT THEREOF, MAGENTA INK COMPOSITION CONTAINING THE ANTHRAPYRIDONE COMPOUND, AND COLORED BODY

摘要

Disclosed is a novel anthrapyridone compound represented by formula (1) or a salt thereof. The compound or a salt thereof enables formation of a magenta dye having a hue with high definition suitable for inkjet recording and excellent storage stability. A matter recorded with such a magenta dye has high fastness. [In the formula, R1 represents a hydrogen atom, an alkyl group or the like; R2 represents a hydrogen atom or a methoxy group; R3 represents an unsubstituted or substituted C5-C12 alkyl group, an unsubstituted or substituted aryl group, or an unsubstituted or substituted heteroaryl group; and one of the substitution positions of -SO2R3 and -SO3H on a benzene ring, which positions are not specified, is para, and the other is ortho, respectively to the substitution position of a nitrogen atom on the benzene ring.]