OXIDATION-RESISTANT WATER-SOLUBLE DYE OF COPPER/PHTHALOCYANINE COMPOUND COMPLEX, DYE COMPOSITION CONTAINING THE SAME, AND RECORDING FLUID

摘要

A water-soluble dye comprising a compound represented by the following general formula (1): (1) wherein at least one of the four rings (A1) to (A4) represents an alkylbenzene ring or benzene ring or at least two thereof represent an alkylbenzene ring and a benzene ring, respectively, and the remaining rings each represents a pyridine ring or chlorobenzene ring; -SO3D and -SO2NHR are substituents present on (A1) to (A4); D represents a monovalent alkali metal, ammonium, or an organic ammonium; m is 1 to 4; -SO2NHR represents -SO2NH2 or a sulfonamide residue capable of forming a complex together with a copper ion; and n is 0 to 3, provided that when n is 0, then not all of the four rings (A1) to (A4) are a benzene ring.