NOVEL AZO COMPOUND, AQUEOUS SOLUTION, INK COMPOSITION, INK FOR INKJET RECORDING, INKJET RECORDING METHOD, INK CARTRIDGE FOR INKJET RECORDING, AND INKJET-RECORDED MATTER

摘要

PROBLEM TO BE SOLVED: To provide a stable ink composition having a good color phase to be used as a black ink.SOLUTION: An aqueous solution contains (a) a preservative and (b) 1-25 mass% at least one of an azo compound as represented in general formula (1). (In general formula (1), G represents N or the like. X-Xeach independently represent H or the like. Y-Yeach independently represent H or a monovalent substituted group, but do not all represent a hydrogen atom at the same time. M each independently represents a hydrogen atom or a monovalent counter cation).