Patent ID: 8226734

Claim:
An azo pigment represented by the general formula (2-1), its tautomer, a salt or hydrate thereof: wherein G 2 represents a hydrogen atom, an aliphatic group, an aryl group or a heterocyclic group, R 21 represents an amino group, an aliphatic oxy group, an aliphatic group, an aryl group, or a heterocyclic group, R 22 represents a substituent, A 2 ′ represents the following general formulae (A-1) to (A-18), (A-20) to (A-28), and (A-30) to (A-32), m represents an integer of from 0 to 5, n represents an integer of from 1 to 4 and, when n=2, the formula represents a dimer formed through R 21 , R 22 , G 2 , or A 2 ′ and, when n=3, the formula represents a trimer formed through R 21 , R 22 , G 2 , or A 2 ′ and, when n=4, the formula represents a tetramer formed through R 21 , R 22 , G 2 , or A 2 ′ and the general formula (2-1) does not contain an ionic hydrophilic group; wherein R 51 to R 57 and R 59 in the general formulae (A-1) to (A-18), (A-20) to (A-28) and (A-30) to (A-32) and R 58 in the general formulae (A-1) to (A-17), (A-20) to (A-28), and (A-30) to (A-32) each represents a hydrogen atom or a substituent, and adjacent substituents may be connected to each other to form a 5- or 6-membered ring, R 58 in the general formula (A-18) represents an acyl group, an acyloxy group, a carbamoyl group, an alkyloxycarbonyl group, an aryloxycarbonyl group, a cyano group, a nitro group, a dialkylphosphono group, a diarylphosphono group, a diarylphosphinyl group, an alkylsulfinyl group, an arylsulfinyl group, an alkylsulfonyl group, an arylsulfonyl group, a sulfonyloxy group, an acylthio group, a sulfamoyl group, a thiocyanato group, a thiocarbonyl group, a halogenated alkyl group, a halogenated alkoxy group, a halogenated aryloxy group, a halogenated alkylamino group, a halogenated alkylthio group, an aryl group substituted with another electron-withdrawing group having a σp value of 0.2 or more, a heterocyclic group, a halogen atom, an azo group, or a selenocyanato group, and * shows the point of attachment to the azo group in the general formula (2-1).