| abstract |
This invention relates to a water soluble azo compound represented by the following formula (1) or its salt, [wherein, n represents an integer of 1 to 3, x represents an integer of 2 to 4, group A represents a carboxyl substituted C1-C20 aliphatic amino group, a sulfo substituted C1-C3 aliphatic amino group, a substituted or non-substituted aryl C1-C4 alkylamino group, a substituted or non-substituted aromatic amino group, and the like]. The water soluble azo compound or its salt being a yellow pigment with excellent storage stability as prepared to an ink composition, and having a high printing concentration in inject recording, the various toughness of the printed article, especially the light resistance is high and being able to provide an ink composition containing said azo compound. |