Crystal of fluoran compound, preparation process of the crystal, and recording material comprising the crystal.

摘要

Disclosed are a crystal of a fluoran compound having the formula (I) comprising exhibiting high peaks at diffraction angles (2 theta ) of 7.5 DEG and 17.0 DEG and relatively high peaks at diffraction angles (2 theta ) of 15.1 DEG , 19.1 DEG , 21.5 DEG and 25.3 DEG in an X-ray diffraction diagram by the Cu-K alpha beam and a crystal of a fluoran compound having the formula (II) comprising exhibiting high peaks at diffraction angles (2 theta ) of 5.5 DEG and 19.2 DEG in an X-ray diffraction diagram by the Cu-K alpha beam, which is useful as a color forming compound in recording materials. <CHEM>