TONER AND DEVELOPER

PROBLEM TO BE SOLVED: To provide a toner that is excellent in low-temperature fixability, heat-resistant storage property, and impact resistance.SOLUTION: There is provided a toner including a binder resin containing a polymer that has a structural unit represented by the following structural formula (1), where the optical purity of the toner X(%)=|X(L body)-X(D body)| represented by the structural formula (1) is 80% or less, where X(L body) represents an L body ratio (mol%) in terms of monomer component, and X(D body) represents a D body ratio (mol%) in terms of monomer component; the toner has a structure having a domain in a matrix and a small domain in the domain. In the structural formula (1), n represents an integer of 10 or more and 1,000 or less.SELECTED DRAWING: None 【課題】低温定着性、耐熱保存性、及び耐衝撃性に優れるトナーの提供。【解決手段】下記構造式（１）で示される構造単位を有するポリマーを含有する結着樹脂を含み、構造式（１）で示されるモノマー成分換算で光学純度Ｘ（％）＝｜Ｘ（Ｌ体）−Ｘ（Ｄ体）｜〔ただし、Ｘ（Ｌ体）はモノマー成分換算でのＬ体比率（モル％）、Ｘ（Ｄ体）はモノマー成分換算でのＤ体比率（モル％）を表す〕が８０％以下であり、マトリックス中にドメインを有し、前記ドメイン中に小ドメインを有する構造を有するトナーである。【化１】（但し、前記構造式（１）中、ｎは、１０以上１，０００以下の整数を示す）【選択図】なし