AB-FUBINACA-d4 (CRM) (Item No. 27238) is a certified reference material intended for use as an internal standard for the quantification of AB-FUBINACA (Item Nos. ISO60211 | 14039) by GC- or LC-MS. AB-FUBINACA is categorized as a synthetic cannabinoid.1,2 It has been found in Spice/K2-type herbal blends. AB-FUBINACA-d4 is regulated as a Schedule I compound in the United States. AB-FUBINACA-d4 (CRM) (Item No. 27238) 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.