Hydroxyzine Dihydrochloride Standard

2-[2-[4-[(4-Chlorophenyl)-phenylmethyl]-1-piperazinyl]ethoxy]ethanol Dihydrochloride; Alamon; Atarax; Ethanol, 2-[2-[4-[(4-chlorophenyl)phenylmethyl]-1-piperazinyl]ethoxy]-, dihydrochloride, (±)-2-[2-[4-(p-Chloro-A-phenylbenzyl)-1-piperazinyl]ethoxy]ethanol dihydrochloride (USP);