An object of the present invention is to provide a recording material or a recording sheet using, as a color-developing agent, a non-phenol-based compound good in color developing performance and the like. A compound represented by the following formula (I) is used as the color-developing agent:
(wherein X represents CH
2
or the like; R
1
to R
3
each independently represent a hydrogen atom, a halogen atom or the like; n1 and n3 each independently represent any integer of 1 to 5; two groups represented by R
3
adjacent to each other on a benzene ring optionally bond to each other to form an optionally substituted 6-membered ring; and n2 represents any integer of 1 to 4).
本发明的目的是提供一种记录材料或记录薄片,使用显色性能良好的非
酚基化合物等作为
显色剂。由下式(I)代表的化合物被用作
显色剂:(其中 X 代表 CH 2 或类似物;R 1 至 R 3 各自独立地代表氢原子、卤素原子或类似物;n1 和 n3 各自独立地代表 1 至 5 的任意整数;在苯环上相邻的两个由 R 3 代表的基团可任意地相互键合以形成任选取代的 6 元环;以及 n2 代表 1 至 4 的任意整数)。