1-(4-Chlorophenyl)-4-(3-chloropropyl)piperazine is an intermediate in the synthesis of 2-[3-[4-(4-Chlorophenyl)-1-piperazinyl]propyl]-1,2,4-triazolo[4,3-a]pyridin-3(2H)-one Hydrochloride (C433100), which is a related compound of Trazodone (T718500), which is an antidepressant.