Patent ID: 7485404
Filing Date: 2009-02-03
Classification: C07D,C09B,Y10S

Abstract:
1. A nonsolvate-form crystal of a polymethine compound represented by the formula (I): wherein X represents Cl or Br; wherein in a TG-DTA (thermogravimetry-differential thermal analysis) chart of the compound, the weight loss in TG at 150° C. and below is not greater than 3%; wherein if X is Cl then the melting point (decomposition temperature) thereof is not lower than 205° C., and the compound is characterized by a powder X-ray diffraction pattern showing characteristic peaks at diffraction angles (2θ±0.2°) of 11.2°, 16.7°, 24.2° and 25.3° in powder X-ray diffraction using the Cu-Kα rays; and wherein if X is Br then the melting point (decomposition temperature) thereof is not lower than 220° C., and the compound is characterized by a powder X-ray diffraction pattern showing characteristic peaks at diffraction angles (2θ±0.2°) of 17.0°, 20.5°, 21.1° and 24.9° in powder X-ray diffraction using the Cu-Kα rays.