Magnetic toner for developing electrostatic latent image

A magnetic toner for developing an electrostatic latent image, comprising toner particles each having a toner core containing a binder resin and a magnetic powder, and a shell layer coating a surface of the toner core, wherein

• the shell layer contains a unit derived from a monomer of a thermosetting resin and a unit derived from a thermoplastic resin,
• the thermosetting resin is one or more resins selected from the group of amino resins consisting of a melamine resin, a urea resin, and a glyoxal resin, and
• an amount of iron eluted from the toner core is 10 mg/L or less, the amount of iron eluted from the toner core being measured through:
• keeping 2 g of the toner core suspended at 60° C. for 6 hours in 50 mL of an aqueous solution of benzohydroxamic acid having a pH adjusted to 4 and a concentration of 2% by mass to obtain a suspension;
• filtering the suspension containing the toner core to obtain a filtrate;
• measuring an absorbance of the filtrate for a light beam having a wavelength of 440 nm;
• and
• measuring the amount of iron eluted from the toner core as an iron concentration in the filtrate based on the absorbance with a standard curve.