(±)-Methadone (hydrochloride) (Item No. ISO00145) is an analytical reference material categorized as an opioid. (±)-Methadone has analgesic activity. Formulations containing (±)-methadone have been used in the treatment of opioid addiction. (±)-Methadone is regulated as a Schedule II compound in the United States. This product is intended for research and forensic applications.