WATER-SOLUBLE AZO COMPOUND OR SALT THEREOF, INK COMPOSITION AND COLORED BODY

摘要

Disclosed is a water-soluble azo compound represented by formula (1), a tautomer thereof, or a salt of the compound or tautomer, which is used as a yellow dye having a hue with high sharpness suitable for inkjet recording. When an ink composition is prepared by using the yellow dye, the ink composition can have excellent storage stability. A recorded matter obtained by using the yellow dye has various high fastness. An ink composition containing one of the compounds is also disclosed. (In the formula, R1 and R2 independently represent a hydrogen atom, a chlorine atom, a sulfo group, a substituted or unsubstituted C1-C4 alkoxy group, a substituted or unsubstituted alkylcarbonylamino group, a substituted or unsubstituted alkylsulfonyl group, a substituted or unsubstituted alkylthio group or the like; R3 represents a methyl group or the like; and R4 represents a sulfo group or the like.)