bk-2C-B (Beta-keto 2C-B)
bk-2C-B (beta-keto 2C-B, code DL-4662) is the cathinone-class beta-keto analogue of the phenethylamine psychedelic 2C-B. Structurally a cathinone by virtue of its beta-keto group, it is sold as a research chemical and reported to combine mild stimulation with faint psychedelic character. Human data is absent; all information is anecdotal.
01 Overview
bk-2C-B sits at the boundary of the cathinone and 2C phenethylamine families, adding a beta-keto group to the 2C-B skeleton. Users report a largely stimulant experience with only weak or absent psychedelic effects compared with 2C-B, plus notable body load.
As a cathinone the class hazards apply: compulsive redosing, cardiovascular strain, comedown and unknown neurotoxicity. No controlled human studies exist; figures are approximate and anecdotal.
02 Mechanism
Presumed monoamine releaser/reuptake inhibitor with partial serotonin 5-HT2A activity inherited from the 2C-B scaffold, though the beta-keto group markedly weakens psychedelic potency.
03 Dosing
| Tier | Dose | Route | Notes |
|---|---|---|---|
| Common | 20–60 mg | Insufflated | Faster onset, notable burn. |
| Common | 40–100 mg | Oral | Anecdotal only. |
04 Effects
| Effect | Magnitude | Evidence | |
|---|---|---|---|
| StimulationEnergy and alertness. | Anecdotal | ||
| Mild psychedeliaFaint visual and perceptual changes, much weaker than 2C-B. | Anecdotal | ||
| Mood elevationMild euphoria and sociability. | Anecdotal |
05 Side effects
| Effect | Severity | Frequency | Evidence | Countermeasures |
|---|---|---|---|---|
| Compulsive redosingUrge to redose as effects fade. | Moderate | Common | Anecdotal | |
| Cardiovascular strainRaised heart rate and blood pressure. | Severe | Common | Unconfirmed | |
| Body load and nauseaNausea, muscle tension and general discomfort. | Moderate | Common | Anecdotal |