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para-Fluorobutyryl fentanyl (hydrochloride)

Item № 17049
Purity ≥98%

Formulation:  A neat solid

     1 mg $65.00 0.00
     5 mg $292.00 0.00

Pricing updated 2019-03-21. Prices are subject to change without notice.

  • This product has been manufactured and tested to meet ISO17025:2005 and Guide 34:2009 guidelines
  • This product is intended to be used as an analytical reference standard
  • Bulk material is available for academic research at qualified institutions; please contact our sales department for pricing
  • 4-FBF
  • p-FBF
  • para-FBF
  • 4-Fluorobutyryl fentanyl
  • p-Fluorobutyryl fentanyl

Fentanyl (Item No. 14719) is a synthetic opioid analgesic that is abused recreationally.1 para-Fluorofentanyl (p-FF; Item No. 15496) is an analog of fentanyl that more potently activates the human μ opioid receptor (EC50s = 4.2 and 28.8 nM, respectively).2 Both fentanyl and p-FF are federally regulated compounds in the United States. para-Fluorobutyryl fentanyl (p-FBF) is an analog of p-FF in which a butyryl group replaces a terminal ethyl group. The physiological and toxicological properties of this compound are not known. This product is intended for forensic and research applications.

This product is a qualified Reference Material (RM) that has been manufactured and tested to meet ISO17025 and Guide 34 guidelines. These materials are tested using validated analytical methods on qualified instrumentation to ensure traceability of measurements. All traceable RMs may be distinguished by their CofAs and can be downloaded below using the batch number located on the product label. For a representative CofA please contact our technical support.

RMs and CRMs produced to accreditation standards: ISO/IEC 17025:2005 · ISO Guide 34:2009
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Technical Information
Formal Name
N-(4-fluorophenyl)-N-[1-(2-phenylethyl)-4-piperidinyl]-butanamide, monohydrochloride
  • 4-FBF
  • p-FBF
  • para-FBF
  • 4-Fluorobutyryl fentanyl
  • p-Fluorobutyryl fentanyl
Molecular Formula
C23H29FN2O • HCl
Formula Weight
A neat solid
InChI Code
InChI Key

Warning - this product is not for human or veterinary use.

Shipping & Storage
Room temperature in continental US; may vary elsewhere
≥ 73 months
Downloads & Resources
Product Downloads

Download Product Insert

Download GC-MS

Download Safety Data Sheet (SDS)

Download free InChI Key generation software

ID Tools

View our Base Peak Identification Tool

View our Flipbook Identification Tool

Additional Information

View the Cayman Structure Database for chemical structure definitions for many Cayman products

View the Cayman Spectral Library (CSL) for ChemStation-searchable GC-MS spectra of many of Cayman's emerging forensic drug standards

Get Batch-Specific Data and Documents by Batch Number

Provide batch numbers separated by commas to download or request available product inserts, QC sheets, certificates of analysis, data pack, and GC-MS data.

References & Product Citations
Product Description References

1. Lendoiro, E., Quintela, O., de Castro, A., et al. Target screening and confirmation of 35 licit and illicit drugs and metabolites in hair by LC-MSMS Forensic Science International 217(1-3), 207-215 (2012).

2. Ulens, C., Van Boven, M., Daenens, P., et al. Interaction of p-fluorofentanyl on cloned human opioid receptors and exploration of the role of Trp-318 and His-319 in μ-opioid receptor selectivity J. Pharmacol. Exp. Ther. 294(3), 1024-1033 (2000).

Technical Support
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