Having previously experienced this compound at an oral dosage of 130mg, I had been left somehow underwhelmed. A slight entactogenesis, enrichment in sound, taste, and smell, somehow brighter colours, minimal patterning on the pavement was all there had been.
bk-2C-B
Well-documented
Well-documented
Multiple authoritative sources agree on dosing and effects.
- 4 corroborating sources
- 1 ROA with full dose ladder
- duration data present
- 18 combo interactions documented
- PubChem toxicity data
- classified Research-chemical
Well-documented
Multiple authoritative sources agree on dosing and effects.
- 4 corroborating sources
- 1 ROA with full dose ladder
- duration data present
- 18 combo interactions documented
- PubChem toxicity data
- classified Research-chemical
Aliases: bk-2cb, bk-2-cb, b-k-2cb, b-k2cb, b-k2-cb, b-k2-c-b, b-k-2-c-b, bk2cb, ฮฒk-2C-B
Summary
ฮฒk-2C-B (also known as Bk-2C-B, or beta-keto 2C-B) is a novel psychedelic substance of the phenethylamine class. It is a structural analog of 2C-B.
Dose Information
| ROA | Light | Common | Strong | Heavy |
|---|---|---|---|---|
| Oral | 60-80mg | 80-100mg | 100-150mg | 150mg+ |
Light
Common
Strong
Heavy
Onset, Duration & After-effects
| ROA | Onset | Total |
|---|---|---|
| Oral | 18-72 min | 18-72 min |
Effect Profile
31 reportsScores (1–10) curated from multiple sources:
- Effect keyword matching from PsychonautWiki catalog
- Validated against 31 Erowid trip reports
- Weighted by importance: core (×3), major (×2), minor (×1)
Psychedelic
6.5
Strong
6/10
Strong visuals, auditory effects, and body load with mild headspace
Visual Intensity
×3
10
color enhancement
tracers
drifting
brightened colour
visual distortions
Headspace Depth
×3
4
confusion
Auditory Effects
×1
10
auditory distortion
Body Load / Somatic Effects
×1
10
nausea
muscle tension
Based on reports from:
Tolerance
Build-up
develops rapidly after a single use (serotonergic psychedelic)
Reset
7โ14 days for baseline
Tolerance Decay
Full tolerance
1h
Half tolerance
10d
Baseline
~14d
Acute tolerance: develops within a single session โ the reset numbers above apply after sustained heavy use, not after one binge. Within-session tachyphylaxis usually resets largely overnight.
Effects
Aggregated from 31 Erowid experience reports
Positive Effects 10
Euphoria
61.3%
70%
Music Enhancement
54.8%
70%
Color Enhancement
48.4%
70%
Empathy
48.4%
70%
Body High
48.4%
70%
Stimulation
48.4%
70%
Focus Enhancement
35.5%
70%
Introspection
19.4%
70%
Tactile Enhancement
19.4%
70%
Creativity Enhancement
9.7%
70%
Adverse Effects 8
Anxiety
51.6%
70%
Pupil Dilation
41.9%
70%
Confusion
38.7%
70%
Nausea
29.0%
70%
Sweating
19.4%
70%
Jaw Clenching
12.9%
70%
Headache
9.7%
70%
Increased Heart Rate
9.7%
70%
Combinations
Cross-Check bk-2C-B with another substanceCommunity Trip Reports
Anecdotal first-person accounts from Reddit, Erowid, and Bluelight. Click a source to expand. Reports are harm-reduction context, not medical guidance.
Erowid 8 reports 2 positive 4 neutral 2 cautionary visit
Hello, I thought I'd write this trip report because I haven't seen a whole lot of information on this amazing chemical bk-2C-B. I have a lot of experience with countless tryptamines, phenylthylamines, just about anything minus the retarded shit such as huffing gasoline hahaha.
This happened a couple weeks ago, on a Sunday. First of all, I didn't have a scale so I eyeballed all doses and parachuted them in a rolling paper. Here is what I think I took : 11:00AM : 60mg - Felt no effects 12:00AM : 40mg - Felt no effects 14:00PM : 50mg - Felt nothing until 6PM.
Bare in mind this post documents the past 2 days of my life and is almost definitely going to be long. This is my report on an insane trip I've had over the past 2 days on a substance called BK-2CB- a legal analogue of the once popular 2CB.
I have vast experience with psilocybin mushrooms, metocin, cannabis, LSD, methoxetamine, kratom, all sorts of pharmaceuticals, 2C-B, MDMA, DMT, and 5-MAPB. This experience happened during an amazing long weekend in which I got to experience 5-MAPB for the first time.
Me and my girlfriend we'll call Destiny ordered 250 mg of BK-2C-B online from the clearnet and were pleasantly surprised to find out that they had given us 330 mg instead. I weighed out a 150 mg dose for myself and a 120 mg dose for her (as she's only about 110 lbs), and placed them into capsules.
On May 9th, 2015, a 25 year old healthy male experienced seizures and sudden cardiac arrest after consuming 140mg of bk-2C-B and 0.25g of cannabis. The subject had never experienced a seizure or cardiac incident before, and has no heart condition. This was the 116th recreational drug he had taken.
7:50pm: Dropped approximately 180mg of bk-2C-B 8:20pm: Starting to feel it. Slight tingling sensations. Feel more energized. Ready to put on some music and start my ridiculous bed dancing I do because I still do not feel comfortable standing up and doing it.
Bluelight Reference Guide
โ Official โ The Big & Dandy ฮฒK-2C-B Thread - Part 1
Welcome to the ฮฒK-2C-B (bk-2C-B) Thread Wikipedia: Bk-2C-B (1-(4-bromo-2,5-dimethoxyphenyl)-2-aminoethan-1-one) Marquis reagent test result [original post:] In these times of ketones, I wondered if anyone had tried bk-2cb? I think is correct name is 2-amino-1-(4-Bromo-2,5-dimethoxyphenyl)ethan-1-one, right? I cann't fi...
Read full thread on Bluelight โ
bk-2C-B's nerd page
Pharmacology, chemical data, effect profiles, and more
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