October 11th, 2003 When I first bought PIHKAL one of the things that caught my attention was the long list of chemicals in the back of the book. The section was entitled 'Book II: The Chemical Story'.
2C-T-21
Encyclopedic
Encyclopedic
Typical encyclopedia coverage. Cross-reference for important decisions.
- 5 corroborating sources
- 1 ROA with full dose ladder
- duration data present
- 17 combo interactions documented
- PubChem toxicity data
- classified Tentative
- classified Research-chemical
Encyclopedic
Typical encyclopedia coverage. Cross-reference for important decisions.
- 5 corroborating sources
- 1 ROA with full dose ladder
- duration data present
- 17 combo interactions documented
- PubChem toxicity data
- classified Tentative
- classified Research-chemical
Aliases: Aurora
Summary
2,5-Dimethoxy-4-ethylfluorothiophenethylamine (also known as 2C-T-21, or colloquially as Aurora) is a psychedelic substance of the phenethylamine chemical class that produces psychedelic effects when administered. It is a member of the 2C-x family of psychedelic phenethylamines, all of which were derived from the systematic modification of the mescaline molecule. 2C-T-21 was first synthesized by Alexander Shulgin and documented in his book PiHKAL ("Phenethylamines I Have Known and Loved").
Perspectives
“I noticed something undefined within five minutes which went away. Within 15 minutes I noticed a definite awareness of activity. There was a progressive increase in awareness of something happening over the next two hours with a plateau of perhaps an hour then occurring. The nature of the happening, as usual, was not clear. During the experience I was more talkative than I usually am. I seemed to be interacting with all others. There was no euphoria but, then, there was no body load or nausea, nor was there any nystagmus. I found a little mental confusion at the peak and there was some searching in my memory bank for the right chips at times. I lost the entire line of one of my conversations at one point during the plateau and had to ask what I was talking about. I tested my visual field on a painting and with sufficient concentration I could get the center part to wiggle a little. I didnβt try to observe anything with my eyes closed. I feel that there was something physical about the eyes. In the evening, after-images were quite intense, and the next day my eyes seemed tired or bothered. What can I say? The material was pleasant and I certainly got the feeling of being high but not getting too much out of it. There were no insights or βah-hahs.”
Dose Information
| ROA | Light | Common | Strong | Heavy |
|---|---|---|---|---|
| Oral | 5-10mg | 10-12mg | 12-15mg | 15mg+ |
Light
Common
Strong
Heavy
Onset, Duration & After-effects
| ROA | Onset | Comeup | Peak | Offset | Total |
|---|---|---|---|---|---|
| Oral | 15-40 min | 30-60 min | 2-5 hrs | 2-4 hrs | 6-12 hrs |
| Insufflated | 5-15 min | 15-30 min | 2-5 hrs | 2-4 hrs | 6-12 hrs |
Effect Profile
28 reportsScores (1–10) curated from multiple sources:
- Effect keyword matching from PsychonautWiki catalog
- Validated against 20 Erowid trip reports
- Weighted by importance: core (×3), major (×2), minor (×1)
Psychedelic
8.8
Intense+
9/10
Strong visuals, headspace, auditory effects, and body load
Visual Intensity
×3
10
color enhancement
tracers
drifting
visual enhancement
pattern recognition enhancement
color shifting
+3 more
Headspace Depth
×3
10
conceptual thinking
emotion enhancement
personal bias suppression
time distortion
confusion
Auditory Effects
×1
10
auditory distortion
Body Load / Somatic Effects
×1
10
temperature regulation suppression
nausea
muscle tension
teeth grinding
increased heart rate
Based on reports from:
Tolerance
Build-up
develops rapidly after a single use (serotonergic psychedelic)
Reset
7β14 days for baseline
Tolerance Decay
Half tolerance
7d
Baseline
~14d
Practical guidance from 2CβTβx/psychedelic literature suggests rapid tolerance after a single strong session, partial decay over several days, and nearβbaseline sensitivity after 1β2 weeks; crossβtolerance occurs with other serotonergic psychedelics (e.g., LSD, psilocybin).
Effects
Aggregated from 20 Erowid and 8 Bluelight experience reports
Positive Effects 37
Stimulation
57.1%
81%
Tactile Enhancement
53.6%
88%
Euphoria
46.4%
84%
Introspection
46.4%
82%
Music Enhancement
42.9%
93%
Empathy
39.3%
78%
Mood Lift
37.5%
87%
Focus Enhancement
35.0%
70%
Color Enhancement
32.1%
88%
Analysis Enhancement
25.0%
81%
Sociability Enhancement
25.0%
80%
Patterning
25.0%
82%
Joy
25.0%
85%
Thought Acceleration
25.0%
80%
Tactile Intimacy Enhancement
25.0%
86%
Body High
21.4%
88%
Closed-Eye Visuals
14.3%
93%
Tingling
12.5%
85%
Love
12.5%
90%
Warmth
12.5%
88%
Adverse Effects 17
Nausea
42.9%
85%
Thought Disorganization
37.5%
76%
Auditory Effects
28.6%
80%
Body Load
25.0%
69%
Anxiety
25.0%
88%
Jaw Clenching
21.4%
90%
Muscle Tension
21.4%
80%
Pupil Dilation
20.0%
70%
Confusion
15.0%
70%
Paranoia
12.5%
85%
Restlessness
12.5%
82%
Loneliness
12.5%
85%
Dysphoria
12.5%
78%
Insomnia
12.5%
80%
Headache
12.5%
85%
Sweating
12.5%
85%
Field Narrowing
12.5%
75%
Combinations
Cross-Check 2C-T-21 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 8 neutral visit
NOTES ON THE EFFECTS: I felt the first alerts within fifteen minutes which was somewhat unexpected. These consisted of a ΒcoldΒ feeling, and slight stomach upset.
Substance: 2C-T-21 Quantity: 12.5mg Experience: First Time Setting: At Home, Alone Administration: Oral Sex: Male Age: 19 Note: I used 30mg clorazepate earlier today and I am still under the influence of it. I don't know how this may effect the experience. So I finally am getting better from being seriously ill.
Background: Both Malloy and I are very experienced with psychedelics. WeΒve explored MDMA, MDA, LSD, mushrooms, mescaline, salvia, 2C-B, 2C-I, 2C-E, DMT, harmaline, 4-HO-DiPT, ketamine, and DXM. The dose was unknown.
Background: I love to trip. I have explored LSD, mushrooms, mescaline, ketamine, 2c-b, 2c-I, 2c-e, salvia, DMT, 5-Meo-DMT, 4-HO-DiPT, DXM, harmaline, PCP (unfortunately), MDMA, and 5-Meo-DALT. I have found that I learn a lot from most of my trips and I try to incorporate the lessons I learn into my daily life.
2C-T-21 is a white powder that I was able to dissolve in water at a concentration of 1mg/ml after considerable shaking. The taste is not at all unpleasant, reminding me of cocaine (without the numbness). I started with a 6mg dose, thinking it would be a barely threshold dose.
Summary: ~6 mg insufflated 2C-T-21 produced a very strong trip that came on almost immediately and was totally unexpected based on prior experiences on 8 and 10 mg ingested orally.
I have yet to experience any strong effects from 2C-T-21. This report is about inactivity at dosages that should, according to other experience reports, be very active. All my research chemicals have been gathered from the same source, and it does not seem the vendor is selling anything but close to pure chemicals.
PiHKAL / TiHKAL
PiHKAL #49: 2C-T-21
“I noticed something undefined within five minutes which went away. Within 15 minutes I noticed a definite awareness of activity. There was a progressive increase in awareness of something happening over the next two hours with a plateau of perhaps an hour then occurring. The nature of the happening, as usual, was not clear. During the experience I was more talkative than I usually am. I seemed to be interacting with all others. There was no euphoria but, then, there was no body load or nausea, nor was there any nystagmus. I found a little mental confusion at the peak and there was some searching in my memory bank for the right chips at times. I lost the entire line of one of my conversations at one point during the plateau and had to ask what I was talking about. I tested my visual field on a painting and with sufficient concentration I could get the center part to wiggle a little. I didnβt try to observe anything with my eyes closed. I feel that there was something physical about the eyes. In the evening, after-images were quite intense, and the next day my eyes seemed tired or bothered. What can I say? The material was pleasant and I certainly got the feeling of being high but not getting too much out of it. There were no insights or βah-hahs.”
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