The crystailline quality of 2-amino-5-nitropyridinium chloride gorwn in solution was examined by X-ray topography. Strong white beam coming from synchrotron was irradiated to an as-grown crystal to avoid an absorption of X-ray. Topographs were taken in transmission geometry (Laue setup). The image obtained by the reflections 10 3, 601, 6 12 and 1 7 0 planes showed fine grey contrast in nearly the whole section. Inclusions and strained growth sector boundaries were clearly observed in these images. These defects disappeared far from the seed in the direction of c-axis. The whole section of the reflection 1 7 0 was full of fine lines along c-axis with white and black contrast. It was found that a dendritic growth leaded to the formation of whiskers slightly misoriented along c-axis. (C) 2003 Elsevier B.V. All rights reserved.