Toner and two-component developer

A toner which has a toner particle and silica fine particle A on a surface of the toner particle, wherein

• a weight average particle diameter of the toner is 4.0 to 15.0 μm,
• a carbon loss ratio when the silica fine particle A is washed with hexane is 5 to 70%, and
• a temperature at which a differential coefficient of a nine-point moving average of integrated values integrated from 35° C. reaches 4000 or more for an intensity of an obtained ion having a mass number (M/z) of 207 is 270° C. or higher, when mass spectrometry is carried out at a sampling interval of 0.4 seconds while heating the silica fine particle A under conditions described below.
• Mass spectrometry conditions:
• (i) 7.0 mg of the silica fine particle A is heated from 35° C. at a temperature increase rate of 20° C./min in a nitrogen atmosphere.
• (ii) Gas generated as a temperature increased is ionized under a condition of an ionization current of 50 μA and an ionization energy of 70 eV.
• (iii) Components contained in the ionized gas are subjected to mass spectrometry at an EM voltage of 1000 V using a quadrupole mass spectrometer.