§2.2.15 · Chemicals › Psychedelics

BK-2C-B

beta-keto 2C-B

Also known as Beta-keto

Acute: Moderate riskDependency: Lower risk

Images

Quick reference

Routes

Oral

Form

Pill

Shulgin rating

++*

Duration

Onset

30 Minutes

Total duration

10 Hours

Experience

Primary effects

Causes mild to intense psychedelic effects with visual blurring/sheen, but no significant distortion or movement.
Induces significant physical sensations including warmth, body tingles, and enhanced tactile sensitivity, potentially accentuating sexual experiences.
Presents with mild anxiolytic properties and can produce an empathogenic edge.

Peak character

A hazy, drifting but intense head buzz, often lacking the intellectual depth of lysergamides.
The experience is very physical, with almost constant tingles and a persistent head haze.
One can remain functional but hiding the psychedelic state from others becomes difficult; communication with third parties may be challenging.

Negatives / side effects

May produce some body strain, though not necessarily excessive.
Effects are considerably diluted if mixed with water; recommended to be taken in a gel cap or bomb with an acid-based drink.
Dose effects are highly variable; some experience intensity at low doses while others feel very little.

Aftereffects / comedown

Can lead to mental fatigue and a lingering psychedelic stimulation/edge the following day.
The experience is significantly long, potentially writing off an entire day, though mood often remains elevated and relaxed.
Mild closed-eye visuals (CEVs) can persist into the night, even after the main effects have subsided.

Reference dosage

Reference ranges from third-party harm-reduction databases. Individual response varies enormously — start lower than you think.

Any route

threshold	50mg+
common	80mg+
strong	100mg+
heavy	150mg+

Reagent testing

Recommended reagents

Marquis Mecke Froehde

Expected reactions

Marquis	Yellow → green
Mecke	Blue/green
Froehde	Orange → brown

Adulterant detection: Beta-keto 2C-B analogue; similar reagent profile to 2C-B.

Cathinone-adjacent structure; standard 2C-x reagent battery.

Source

Reference fields and narrative for BK-2C-B extracted from The Drug Users Bible by Dominic Milton Trott (MxZero Publishing, 2022).

drugusersbible.com

Harm reduction notice

This platform provides educational and harm-reduction information adapted from public reference material. It does not endorse, encourage, or facilitate drug use. It is not medical advice. If you or someone near you may be in a medical emergency, contact local emergency services immediately.