Patent ID: 7544455

Claim:
A magnetic toner comprising magnetic toner particles each comprising a binder resin and a magnetic iron oxide particle, wherein: when a solution is prepared by dissolving the magnetic iron oxide particles in an acidic aqueous solution and an Fe element amount in a solution in which all the magnetic iron oxide particles are dissolved is defined as a total Fe element amount, a ratio X of an amount of Fe(2+) in a solution in which the magnetic iron oxide particles are dissolved to a state where 10 mass % of the total Fe element amount is present in the solution (solution having an Fe element-dissolving ratio of 10 mass %) to an Fe element amount in the solution having an Fe element-dissolving ratio of 10 mass % is 34 mass % or more and 50 mass % or less; and dielectric loss tangents of the magnetic toner measured at a temperature of 40° C. satisfy the following conditions (a) to (c): (a) a dielectric loss tangent A at a frequency of 10,000 Hz is 1.0×10 −6 or more and 1.0×10 −1 or less; (b) a dielectric loss tangent B at a frequency of 1,000 Hz is 1.0×10 −6 or more and 1.0×10 −1 or less; and (c) a ratio (A/B) of the dielectric loss tangent A to the dielectric loss tangent B is 0.10 or more and 10.00 or less.