The title compound 1- N -(3-pyridylmethyl)aminonaphthalene hydrochloride (C 16 H 15 N 2 Cl) was obtained by a reaction of α -naphthylamine ( 1 ) and N- pyridincarboxaldehyde ( 2 ) in anhydrous ethanol in the first step. The formed imine ( 3 ) was reduced with sodium borohydride in anhydrous methanol to give the product 1- N -(3-pyridylmethyl)aminonaphthalene ( 4 ). Finally, the hydrochloride was prepared by addition of a hydrochloric acid–ethyl acetate solution (ratio 1:3) with constant stirring and maintaining the temperature between 0 and 5 °C, obtaining a yellow polycrystalline solid corresponding to the respective derivative ( 5 ). The X-ray powder diffraction pattern for the new compound ( 5 ) was obtained. The compound ( 5) crystallizes in a monoclinic system with the space group P 2 1 / m (No. 11) and refined unit-cell parameters: a = 16.257 (8) Å, b = 9.236 (7) Å, c = 13.221 (6) Å, β = 94.87° (5), Z = 6, and V = 1978 (1) Å 3 .