4-Fluoroethcathinone, commonly called 4-FEC, is categorized as a stimulant within the cathinone class. It is a structural analog to mephedrone (4-fluoro methcathinone) and has been distributed as a designer drug in the market.

IUPAC name
CAS Number1225625-74-0 
PubChem CID82100444
Chemical and physical data
Molar mass195.237 g·mol−1


1. What is 4-Fluoroethcathinone (4-FEC)?

  • 4-Fluoroethcathinone, or 4-FEC, is a synthetic stimulant under the cathinone class. It is chemically related to substances like mephedrone (4-fluoromethcathinone).

2. How is 4-FEC commonly sold or distributed?

  • 4-FEC is often encountered as a designer drug and may be sold or distributed through various channels, including online sources.

3. What are the potential effects of 4-FEC use?

  • The specific effects of 4-FEC may vary among individuals. Generally, it is classified as a stimulant, and users may experience increased alertness, energy, and euphoria. However, the exact effects and potential risks need to be well-documented due to limited scientific research.

4. Is 4-FEC associated with any health risks or adverse effects?

  • Since scientific research on 4-FEC is limited, the full spectrum of its potential health risks and adverse effects is not well-established. As with any designer drug, users should exercise caution, as unexpected consequences may occur.

5. Is 4-FEC used for any medical purposes?

  • 4-FEC does not have recognized medical applications. It is primarily encountered and used as a recreational substance.

6. What is the legal status of 4-FEC in various jurisdictions?

  • The legal status of 4-FEC can vary by country and region. It’s crucial to check local laws and regulations to determine its legal status in a specific location, as it may be controlled or prohibited in some areas.


  1. “4-Fluoroethcathinone (hydrochloride)” is a chemical compound available from Cayman Chemical, which is known for providing research chemicals and reference materials for scientific studies and analysis.
  2. In a study conducted by Westphal F and Junge T in November 2012, they explored the “Ring positional differentiation of isomeric N-alkylated fluorocathinones by gas chromatography/tandem mass spectrometry.” Their research, published in the Forensic Science International journal (Volume 223, Issues 1–3), focused on analytical methods to differentiate between isomeric N-alkylated fluorocathinones.

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