Toner

A toner, comprising:

• a toner particle comprising a magnetic body, the magnetic body being present on a surface of the toner particle;
• and
• a silica fine particle on the surface of the toner particle, wherein fragment ions corresponding to a structure represented by Formula (1) are observed in a measurement of the silica fine particle by time-of-flight secondary ion mass spectrometry
• where n represents an integer of 1 or more;
• when 2.00 g of the silica fine particle is dispersed in a mixed solution of 25.0 g of ethanol and 75.0 g of a 20 mass % aqueous solution of NaCl, followed by a titration operation using sodium hydroxide
• 0.05≤Sn≤0.20
• Sn={(a−b)×c×NA}/(d×e)
• where a is a NaOH titer (L) required to adjust to 9.0 a pH of the mixed solution in which the silica fine particle has been dispersed, b is a NaOH titer (L) required to adjust to 9.0 a pH of the mixed solution, c is a concentration (mol/L) of the NaOH solution used for titration, NA is Avogadro's number, d is a mass (g) of the silica fine particle, and e is a BET specific surface area (nm2/g) of the silica fine particle;
• and
• in a chemical shift obtained by solid-state 29Si-NMR DD/MAS of the silica fine particle, with D denoting an area of a peak having a peak top present in a range from −25 to −15 ppm, S denoting the sum total of areas of peaks of an M unit, a D unit, a T unit and a Q unit present in a range from −140 to 100 ppm, and B (m2/g) denoting a specific surface area of the silica fine particle,
• a value (D/S)/B of a ratio of (D/S) relative to B is 5.7×10−4 to 56×10−4;
• (D/S)/B measured after washing of the silica fine particle with chloroform is 1.7×10−4 to 56×10−4;
• with D1 as an area of a peak having a peak top present in a range of more than −19 ppm and −17 ppm or less, in the chemical shift, a value (D1/D) of a ratio of D1 relative to D is 0.10 to 0.30.