Patent ID: 8206465

Claim:
An azo pigment represented by the general formula (1), a tautomer, salt, or hydrate of the azo pigment: wherein G 1 represents 5- or 6-membered ring together with carbon atoms and a nitrogen atom(s), the heterocyclic ring may be an aromatic ring or a condensed ring; Y represents a hydrogen atom or an aliphatic group; R 1 represents an aliphatic group, an aliphatic amino group, an arylamino group, a heterocyclic amino group, an acylamino group, a sulfonamido group, an amino group, or a heterocyclic group; R 2 and R 3 each independently represents an aliphatic amino group, an arylamino group, a heterocyclic amino group, an acylamino group, a sulfonamido group, an amino group, or a heterocyclic group; X 1 represents a nitrogen atom or C—Z, Z represents an electron-withdrawing group having a Hammett σp value of 0.2 or more; X 2 represents a nitrogen atom or C—R 5 , R 5 represents a hydrogen atom, a cyano group, a carbamoyl group, an aliphatic oxycarbonyl group, or a carboxyl group; n represents an integer of from 1 to 4; when n=2, the general formula (1) represents a dimer formed through R 1 , R 2 , R 3 , Y, Z, or G; when n=3, the general formula (1) represents a trimer formed through R 1 , R 2 , R 3 , Y, Z, or G; and when n=4, the general formula (1) represents a tetramer formed through R 1 , R 2 , R 3 , Y, Z, or G.