Isobutyryl fentanyl-d5 (hydrochloride) (exempt preparation)

Isobutyryl fentanyl-d₅ (hydrochloride) (exempt preparation) is intended for use as an internal standard for the quantification of isobutyryl fentanyl by GC- or LC-MS. Isobutyryl fentanyl is categorized as an opioid.¹ Isobutyryl fentanyl-d₅ is regulated as a Schedule I compound in the United States. Isobutyryl fentanyl-d₅ (hydrochloride) (exempt preparation) is provided as a DEA exempt preparation. This product is intended for research and forensic applications.

1. Woods, J., Medzihradsky, F., Smith, C., et al. Evaluation of new compounds for opioid activity: 1987 Annual report 81,543-590(1988).