Patent ID: 8222410

Claim:
An azo pigment represented by the following formula (1), a tautomer of the azo pigment, or a salt or hydrate thereof: wherein Q represents the non-metallic atoms necessary to complete a 5- to 7-membered heterocyclic group, W represents an alkoxy group, an amino group, an alkyl group, or an aryl group, X 1 and X 2 each independently represents a hydrogen, an alkyl group, an acyl group, an alkylsulfonyl group, or an arylsulfonyl group, R 1 represents a hydrogen or a substituent, R 2 represents a heterocyclic group, n represents 2 and, formula (1) represents a dimer formed through Q, W, X 1 , X 2 , R 1 , or R 2 .