| abstract |
To provide a novel crystal form of risperidone. [MEANS FOR SOLVING PROBLEMS] It is characterized by powder X-ray diffraction peaks at 16.5 ± 0.2, 21.7 ± 0.2 degrees 2θ, for example, 16.5 ± 0.2, 12.6 ± 0.2, 21.7 ± 0.2, 15.6 ± 0.2, 17.0 ± 0.2, 18.4 ± 0.2 Characterized by powder X-ray diffraction peaks at 19.1 ± 0.2, 21.3 ± 0.2, 24.0 ± 0.2, 24.9 ± 0.2, 27.0 ± 0.2 degrees 2θ, for example, the powder X-ray diffraction pattern depicted in FIG. Risperidone polymorph E. [Selection figure] None |