Patent ID: 7169523

Claim:
An electrophotographic toner, comprising at least a binder resin, a colorant and a charge control agent consisting of the naphthol derivative represented by formula [I] or a salt thereof: wherein Y is selected from the group consisting of an esterified carboxyl group and a group of —(CONH)n-X (wherein X is selected from the group consisting of an optionally branched and optionally substituted hydrocarbon group which may have an unsaturated bond, an optionally substituted aromatic group and a heterocyclic group having conjugated double bonds, and n is an integer of 1 or 2); R is selected from the group consisting of a hydrogen atom, alkaline metal, optionally branched, optionally substituted C1 to C6 alkyl and acyl groups, and phenylalkyl group; Q is selected from the group consisting of optionally branched C1 to C6 alkyl and alkoxy groups, halogen atom, nitro group, nitroso group, amino group and sulfo group; and m is an integer of 0 to 3.