Patent ID: 7326288

Claim:
A trisazo compound represented by Formula (1) as shown below or a salt thereof; wherein, each of R 1 and R 2 independently represents a hydrogen atom; a halogen atom; a cyano group; a carboxyl group; a sulfo group; a sulfamoyl group; an N-alkylaminosulfonyl group; an N-phenylaminosulfonyl group; a phosphoric acid group; a nitro group; an acyl group; a ureide group; a (C1 to C4) alkyl group which may be substituted with a hydroxy group or a (C1 to C4) alkoxy group; a (C1 to C4) alkoxy group which may be substituted with a hydroxy group, a (C1 to C4) alkoxy group, a sulfo group or a carboxyl group; or an acylamino group: A represents a phenyl group or a naphthyl group wherein, these phenyl group and naphthyl group may be substituted with a halogen atom; a cyano group; a carboxyl group; a sulfo group; a sulfamoyl group which may be substituted with an alkyl group or a phenyl group; a phosphoric acid group; a nitro group; an acyl group; a ureide group; a (C1 to C4) alkyl group which may be substituted with a hydroxy group or a (C1 to C4) alkoxy group; a (C1 to C4) alkoxy group which may be substituted with a hydroxy group, a (C1 to C4) alkoxy group, a sulfo group or a carboxyl group; or an acylamino group.