A compound represented by formula (1) or a salt thereof, and an ink including the same. In formula (1), each Q independently represents a halogen atom; R
11
and R
12
independently represent an alkyl group substituted by an ionic hydrophilic group; and A
1
represents a C1-C3 alkoxy-substituted alkylamino group
由式(1)表示的化合物或其盐,以及包含该化合物的墨
水。在式(1)中,每个Q独立表示卤素原子;R11和R12分别表示被离子亲
水基团取代的烷基基团;A1表示C1-C3烷氧基取代的烷基
氨基基团。