Q 1219 (OTTO) Quinacrine hydrochloride, 99% Cas 69-05-6 - used in cell biological experiments as an inhibitor of phospholipase A2. Q 1219 (OTTO) Quinacrine hydrochloride, 99% Cas 69-05-6 - used as an antiprotozoal, antirheumatic, antimalarial and intrapleural sclerosing agent.