cis-Tramadol-d6 (hydrochloride) (exempt preparation) (Item No. 42406) is intended for use as an internal standard for the quantification of cis-tramadol (Item Nos. ISO60149 | 15919) by GC- or LC-MS. cis-Tramadol is categorized as an opioid.1 cis-Tramadol-d6 is regulated as a Schedule IV compound in the United States. cis-Tramadol-d6 (hydrochloride) (exempt preparation) (Item No. 42406) is provided as a DEA exempt preparation. This product is intended for research and forensic applications.WARNING This product is not for human or veterinary use.