Aleph-2
chemical compound

Aleph-2, or ALEPH-2, also known as 4-ethylthio-2,5-dimethoxyamphetamine, is a psychedelic drug of the phenethylamine, amphetamine, and DOx families. It is one of the Aleph series of compounds. The drug was encountered as a novel designer drug in Europe in 2023.
Use and effects
In his book PiHKAL (Phenethylamines I Have Known and Loved), Alexander Shulgin lists Aleph-2's dose as 4 to 8 mg orally and its duration as 8 to 16 hours. The effects of Aleph-2 have been reported to include "almost no visual phenomena" to "extraordinary visuals and interpretations", visual distortion and movement, enhanced auditory and tactile perception, and a sensation of physical warmth, and residual shakiness and muscle tremors, among others. There is an unpredictability with the dosing and effects of Aleph-2, such that one person who took 4 mg had strong effects including ending up in a fetal position, in relative hibernation for several hours, and with substantial amnesia, whereas another person who took 8 mg experienced only a bare threshold including slight lightheadedness.
Interactions
Pharmacology
Pharmacodynamics
Aleph-2 acts as a serotonin 5-HT2 receptor agonist. The drug is also a weak monoamine oxidase inhibitor (MAOI), with IC50Tooltip half-maximal inhibitory concentration values of 3,200 nM for monoamine oxidase A (MAO-A) and >100,000 nM for monoamine oxidase B (MAO-B). Aleph-2 produces anxiolytic effects in rodents.
Chemistry
Synthesis
The chemical synthesis of Aleph-2 has been described.
“Aleph-2” enters the record as chemical compound. Crown Archives preserves that source wording while asking what Aleph-2, chemical and compound can confirm, complicate or overturn.
Why this record matters
“Aleph-2” is worth following because a concise public description often conceals a longer documentary argument. Here, Aleph-2, chemical and compound provides the most credible route into that argument.
Stable identifiers, scientific names and standards terminology offer the best bridge between this overview and specialist evidence. The source revision retrieved here is dated Feb 10, 2026. The linked authority identifier is Q16527585. The first chronological checks are 2023.
Scientific names, classifications and consensus can change while older terminology persists in catalogues and historical literature. The lead is largely declarative, so disagreement and counter-evidence require a deliberate search beyond the opening account. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
How to read it
Check terminology, classification and the date of the cited evidence. Scientific names and technical consensus can change while older records retain historical value.
- Current terminology
- Classification context
- Finding cited technical literature
Primary datasets, specimen catalogues, standards bodies and the most recent peer-reviewed literature.
Three-step research path
- Establish the record: confirm the title “Aleph-2”, its source revision and the description used here.
- Expand the search: follow Aleph-2 primary sources, Aleph-2 archive and Aleph-2 research across catalogues and specialist indexes.
- Test the account: compare the strongest cited source with the responsible institution’s current record and note any disagreement.
Questions for further research
- Which source most directly establishes the central claim about “Aleph-2”?
- Which observation, specimen, dataset or publication supports the account?
- Has classification or technical consensus changed since the cited source?
Search terms from this dossier
This entry incorporates text from “Aleph-2” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.