Hydroxyzine Hydrochloride - Impurity A (EP/BP); 1-(p-Chloro-α-phenylbenzyl)piperazine; 4-(4-Chlorobenzhydryl)piperazine; N-(4-Chlorobenzhydryl)piperazine; Norchlorcyclizine; Hydroxyzine Related Compound A; Cetirizine Hydrochloride;CBHP; (RS)-1-[(4-Chlorophenyl)phenylmethyl]piperazine (USP)