WATER-SOLUBLE ANTHRAPYRIDONE COMPOUND OR SALT THEREOF, INK COMPOSITION, AND COLORED MATERIAL

摘要

Disclosed is an anthrapyridone compound represented by the formula (1) or a salt thereof. (1) wherein R1 represents a hydrogen atom or a C1-C8 alkyl group; a sulfonate group substituent which is located on the benzene ring substituted by a cyanuric amino group and an azo group and whose substitution position on the benzene ring is not specified is located at position-2 or position-4 when the position to be substituted by the cyanuric amino group is defined as position-1 and the position to be substituted by the azo group is defined as position-5 in the benzene ring; and R represents a hydroxy group, an anilino group, a toluidino group, a xylidino group, a (C2-C8)alkylanilino group, a phenyl(C1-C3)alkylamino group, a (C1-C12)alkylamino group, a di(C1-C12)alkylamino group, a carboxy(C1-C12)alkylamino group or a sulfo(C1-C12)alkylamino group.