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Clinical data
ATC code none
Legal status
Legal status
Synonyms β-hydroxythiofentanyl
CAS Number 1474-34-6
PubChem (CID) 62278
ChemSpider 21106268 YesY
Chemical and physical data
Formula C20H26N2O2S
Molar mass 358.498 g/mol
3D model (Jmol) Interactive image

β-Hydroxythiofentanyl is an opioid analgesic that is an analogue of fentanyl.

β-hydroxythiofentanyl was sold briefly on the black market in the early 1980s, before the introduction of the Federal Analog Act which for the first time attempted to control entire families of drugs based on their structural similarity rather than scheduling each drug individually as they appeared.[1] β-hydroxythiofentanyl was anecdotally said to be one of the more favored fentanyl analogues by opiate addicts, but nevertheless its brief career as a street drug did not survive the introduction of the Analogues Act.

β-hydroxythiofentanyl has similar effects to fentanyl. Side effects of fentanyl analogs are similar to those of fentanyl itself, which include itching, nausea and potentially serious respiratory depression, which can be life-threatening. Fentanyl analogs have killed hundreds of people throughout Europe and the former Soviet republics since the most recent resurgence in use began in Estonia in the early 2000s, and novel derivatives continue to appear.[2]

Legal Status[edit]

As of October 2015 β-hydroxythiofentanyl is a controlled substance in China.[3]

As of May 2016 β-hydroxythiofentanyl is a Schedule I controlled substance in the United States.[4]


  1. ^ Henderson, GL (1988). "Designer Drugs: Past History and Future Prospects". Journal of Forensic Sciences. 33 (2): 569–575. 
  2. ^ Jane Mounteney; Isabelle Giraudon; Gleb Denissov; Paul Griffiths (July 2015). "Fentanyls: Are we missing the signs? Highly potent and on the rise in Europe.". The international journal of drug policy. 26 (7): 626–631. doi:10.1016/j.drugpo.2015.04.003. PMID 25976511. 
  3. ^ "关于印发《非药用类麻醉药品和精神药品列管办法》的通知" (in Chinese). China Food and Drug Administration. 27 September 2015. Retrieved 1 October 2015. 
  4. ^ "Schedules of Controlled Substances: Temporary Placement of Butyryl Fentanyl and Beta-Hydroxythiofentanyl into Schedule I" (PDF). Drug Enforcement Agency. 12 May 2016.