The title compound 4-(8-chloro-[1,2,4]triazolo[4,3-a]pyridin-3-yl)phenol was structurally characterized by X-ray crystal structural analysis. The crystals are triclinic, space group P-1 with a = 7.307(3), b = 11.792(4), c = 12.474(5) angstrom, alpha = 83.850(10), beta = 87.148(13), gamma = 77.691(11)degrees, V = 1043.6(6) angstrom(3), Z = 2, F(000) = 504, D-c = 1.564 g/cm(3), mu = 0.350 mm(-1), the final R = 0.0433 and wR = 0.1232. A total of 10,746 reflections were collected, of which 4920 were independent (R-int = 0.0357). In the crystal packing diagram, intermolecular O-H center dot center dot center dot Cl and C-H center dot center dot center dot O hydrogen bonds stabilize the solid state of the title compound.