| abstract |
The present invention provides a novel azo compound or a salt thereof excellent in color density and saturation. An azo compound represented by the formula (I) or a salt thereof [in the formula (I), Z 1 and Z 2 each independently represents an oxygen atom or a sulfur atom. R 1 to R 4 each independently represents a hydrogen atom, a saturated aliphatic hydrocarbon group, an alkoxyl group, an aryl group, or an aralkyl group. R 5 to R 12 each independently represents a hydrogen atom, a halogen atom, a saturated aliphatic hydrocarbon group, an alkoxyl group, a carboxyl group, a sulfo group, a sulfamoyl group, or an N-substituted sulfamoyl group. ]. [Selection figure] None |