Toner

A toner comprising

• a toner particle comprising polyester resin, and
• a silica fine particle on a surface of the toner particle, wherein
• fragment ions corresponding to a structure represented by a following formula (1) are observed in a time-of-flight secondary ion mass spectrometry measurement of the silica fine particle,
• in the formula (1), n represents an integer of 1 or more,
• where 2.00 g of the silica fine particle is dispersed in a mixed liquid of 25.0 g of ethanol and 75.0 g of a 20% by mass NaCl aqueous solution and a titration operation using sodium hydroxide is performed, Sn defined by a formula Sn={(a−b)×c×NA}/(d×e) satisfies a following formula (2),
• 0.05≤Sn≤0.20 (2)
• in the formula Sn={(a−b)×c×NA}/(d×e),
• a is a NaOH titer (L) required to adjust the mixed liquid, in which the silica fine particle is dispersed, to pH 9.0,
• b is a NaOH titer (L) required to adjust the mixed liquid of 25.0 g of ethanol and 75.0 g of a 20% by mass NaCl aqueous solution to pH 9.0,
• c is the concentration (mol/L) of the NaOH solution used for titration,
• NA is an Avogadro's number,
• d is the mass (g) of the silica fine particle, and
• e is a BET specific surface area (nm2/g) of the silica fine particle,
• where, in a chemical shift obtained by a solid-state 29Si-NMR DD/MAS method of the silica fine particle, an area of a peak having a peak top present in the range from −25 to −15 ppm is denoted by D, the sum of the peak areas of an M unit, a D unit, a T unit, and a Q unit present in the range from −140 to 100 ppm is denoted by S, and a specific surface area of the silica fine particle is denoted by B (m2/g),
• a value (D/S)/B of the ratio of (D/S) to B is 5.7×10−4 to 4.9×10−3,
• the (D/S)/B measured after washing the silica fine particle with chloroform is 1.7×10−4 to 4.9×10−3,
• where an area of a peak having a peak top present in the range from more than −19 ppm to −17 ppm or less in the chemical shift is denoted by D1, a value (D1/D) of the ratio of D1 to D is 0.09 to 0.32, and
• the polyester resin is present on the surface of the toner particle.