Patent ID: 7301012

Claim:
An azo dye represented by formula (1): wherein A and B each independently represents an aromatic group which may be substituted or a heterocyclic group which may be substituted, wherein A is a monovalent group and B is a divalent group; R 1 , R 2 , R 3 and G each independently represents a hydrogen atom; a halogen atom; an aliphatic group; an aromatic group; a heterocyclic group; a cyano group; a carboxyl group; a carbamoyl group; an alkoxycarbonyl group; an aryloxycarbonyl group; an acyl group; a hydroxyl group; an alkoxy group; an aryloxy group; a silyloxy group; an acyloxy group; a carbamoyloxy group; a heterocyclic oxy group; an alkoxycarbonyloxy group; an aryloxycarbonyloxy group; an amino group substituted by an alkyl group, an aryl group or a heterocyclic group; an acylamino group; an ureido group; a sulfamoylamino group; an alkoxycarbonylamino group; an aryloxycarbonylamino group; an alkylsulfonylamino group; an arylsulfonylamino group; a nitro group; an alkylthio group; an arylthio group; an alkylarylsulfonyl group; an arylsulfonyl group; an alkylsulfinyl group; an arylsulfinyl group; a sulfamoyl group; a sulfo group; or a heterocyclic thio group, and R 1 , R 2 , R 3 and G may be substituted; X represents an oxygen atom or a sulfur atom; m represents an integer of from 0 to 4 and a number of substituent(s) other than hydrogen atom(s).