Azo compound, azo pigment, pigment dispersion, coloring composition, ink for inkjet recording, coloring composition for color filter, color filter, and process for preparing a coloring composition for color filter

An azo compound represented by the general formula (2-1), its tautomer, a salt or hydrate thereof:

• wherein G2 represents a hydrogen atom, an aliphatic group, an aryl group, or a heterocyclic group, R21 represents an amino group, an aliphatic oxy group, an aliphatic group, an aryl group, or a heterocyclic group, R22 represents a substituent, A2′ 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 R21, R22, G2, or A2′ and, when n=3, the formula represents a trimer formed through R21, R22, G2, or A2′ and, when n=4, the formula represents a tetramer formed through R21, R22, G2, or A2′, and the general formula (2-1) does not contain an ionic hydrophilic group:
• wherein R51 to R57 and R59 in the general formulae (A-1) to (A-18), (A-20) to (A-28), and (A-30) to (A-32) and R58 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, R58 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).