Water-soluble azo compound or salt thereof, ink composition, and colored matter

Abstract

Disclosed is a water-soluble azo compound represented by formula (1) or a salt thereof, which functions as a yellow dye having a high print density suitable for inkjet recording. Matter recorded by using the water-soluble azo compound or a salt thereof has high fastness in various fields, and an ink composition prepared by using the water-soluble azo compound or a salt thereof has excellent storage stability. An ink composition containing the water-soluble azo compound or a salt thereof is also disclosed. In formula (1), R represents a hydrogen atom or the like; n represents an integer of 1-3; m represents 1 or 2; x represents an integer of 2-4; and group A represents a carboxy-substituted C1-C20 aliphatic amino group, a sulfo-substituted C1-C3 aliphatic amino group, a substituted or unsubstituted aromatic amino group, a substituted or unsubstituted aryl C1-C4 alkylamino group, or the like.

Dependencies are inferred from the claim text.