Novel azo dye compound

摘要

A compound represented by formula (I): Formula (I) wherein Z₁ and Z₂ each are atoms necessary for forming an aromatic ring; V₁ and V₂ each are a substituent W₁ or W₂; when at least one V₁ is W₁, at least one V₂ is W₂, or when at least one V₁ is W₂, at least one V₂ is W₁; r is 1 to 4; s is 1 to 4; M₁ is a counter ion; m₁ is the number necessary for neutralizing charge; W₁ is a hydroxyl, primary- or secondary- or tertiary-amino, acylamino, or sulfonamido group; W₂ is a nitro, cyano, alkoxycarbonyl, aryloxycarbonyl, alkyl- or aryl-sulfonyl, carbamoyl, sulfamoyl, alkenyl, alkynyl, aryl, heterocyclic, sulfo, carboxyl, heterocyclic oxy, ammonio, alkyl- or aryl-sulfinyl, alkyl- or aryl-sulfonyl, acyl, or aryl- or heterocyclic-azo group; and the aromatic ring may have a substituent other than V₁ and V₂.