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Systematic (IUPAC) name
Clinical data
Legal status
  • AU: Analogue of 2C-B
  • CA: Legal
  • UK: Unlicensed
  • US: Analogue of 2C-B
Routes Oral, Insufflated, Rectal
CAS number 807631-09-0
ATC code ?
PubChem CID 11288812
ChemSpider 9463799
Chemical data
Formula C10H12BrNO3 
Molecular mass 274.111 (Freebase) 310.572 (HCl salt)

βk-2C-B (Beta-keto 2C-B, Bk-2C-B) is a psychedelic drug which is structurally related to 2C-B. It has been reported to have a similar effect to this drug in humans and has been used recreationally.[1][unreliable source?][2][unreliable source?]


Conventional theory suggested primary βk-primary amines would be too prone to dimerisation to be stable in solution or when stored for long periods, but βk-2C-B.HCl is stable when kept dry. Exposure to neutral or basic aqueous solutions causes reaction to a purple solid.

βk-2C-B turns bright orange when exposed to the marquis reagent.[3][unreliable source?]

Dosage and effects[edit]

The dosage is 80–160 mg and the duration is approximately ten hours, notably much longer than 2C-B.[2][unreliable source?]

See also[edit]


  1. ^ "The Big & Dandy βK-2C-B (bk-2C-B) Thread". Bluelight.org. 2013-09-27. Retrieved 2013-10-17.  |first1= missing |last1= in Authors list (help)
  2. ^ a b "bk-2C-B experiences/TRs". ukchemicalresearch.org/. 2013-09-26. Retrieved 2013-10-17. 
  3. ^ "The Big & Dandy βK-2C-B (bk-2C-B) Thread". Bluelight.org. 2013-10-17. Retrieved 2013-10-17.