Add to ORKGR factor = 0.030; wR factor = 0.076; data-to-parameter ratio = 16.8. In the title salt, C11H12ClN2O +Cl, the ten non-H atoms comprising the quinolinium residue are coplanar (r.m.s. deviation = 0.041 Å) and the hydroxyethyl group is approxi-mately perpendicular to this plane [Cring—N— Cmethylene—C torsion angle = 74.61 (18)]. A supramolecular chain aligned along [101] mediated by charge-assisted O/N— H Cl hydrogen bonds features in the crystal packing. Chains are connected into a three-dimensional architecture by C—H O(hydroxy) interactions. Related literature For the wide range of pharmacological activities of synthetic and natural products containing the quinoline nucleus, see