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The title compound, 1-anilino-4-hydroxyanthraquinone (Fig. 1), has been developed and used as an anthraquinone dyestuff called C.I. (Color Index) Disperse Violet 27 (C.I. 60724). 1,2 Despite the commercial significance of this dye class, a search of the literature suggested that the crystal structures of the anthraquinone dyes had not been published. With these points in mind, this paper presents the results of an X-ray analysis of the title compound during the course of our investigation concerning the structures and properties of disperse dyes. The disperse dye used was purchased from Clariant Co. Single crystals suitable for X-ray crystallography were prepared by recrystallization from toluene. The crystal and experimental data are given in Table 1. The structure was solved by direct methods and refined with anisotropic temperature factors for non-hydrogen atoms. All hydrogen atoms were located from difference Fourier maps and were not refined. The atomic coordinates for non-hydrogen atoms are listed in Table 2. The selected bond lengths and bond 1355

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