| 摘要 |
Provided are: a dye which exhibits extremely excellent (ozone) gas resistance, extremely high print density, low color rendering properties, low color saturation, and high-quality black hue when is recorded on a paper only for inkjet printing purposes, i.e., an azo compound represented by formula (1), a tautomer of the azo compound, or a salt of the azo compound or the tautomer; and an ink composition containing the dye, particularly a black ink composition for inkjet recording applications. In the formula, R 1 represents a (C1-C4) alkyl group, or the like; R 2 represents a cyano group, or the like; R 3 and R 4 independently represent a hydrogen atom, a sulfo group, a (C1-C4) alkoxy group, or the like; R 5 and R 7 independently represent a (C1-C4) alkylthio group, or the like; R 6 and R 8 independently represent a (C1-C4) alkylcarbonylamino group; R 9 and R 10 independently represent a (C1-C4) alkoxy group, or the like; and R 11 to R 13 independently represent a hydrogen atom, a sulfo group, or the like. |
