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2CT4-2-EtO

pharmaceutical compound

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Record originEnglish Wikipedia
Text licenseCC BY-SA 4.0
Source revisionApr 10, 2026
Entity authorityQ139505711 ↗
Source-derived summary

2CT4-2-EtO, also known as 2-ethoxy-5-methoxy-4-isopropylthiophenethylamine or as Tenderness, is a psychoactive drug of the phenethylamine, 2C, and TWEETIO families related to the psychedelic drug 2C-T-4. It is the derivative of 2C-T-4 in which the methoxy group at the 2 position has been replaced with an ethoxy group.

According to Alexander Shulgin in his book PiHKAL (Phenethylamines I Have Known and Loved) and other publications, 2CT4-2-EtO's dose is 10 to 25 mg orally and its duration is approximately 10 hours. Doses between 10 and 25 mg with 5-mg increments resulted in virtually no differences in effects or duration, with a gentle "plus-two" on the Shulgin Rating Scale being reached independently of dose. However, in another publication, Shulgin stated that the dose affected the duration only. The effects of 2CT4-2-EtO have been reported to include "a peaceful meditative inner receptiveness and clarity" and "an honest connection felt with those who were present during the experience". This resulted in the drug being given the nickname "Tenderness". 2CT4-2-EtO also caused uncomfortable sleep.

The chemical synthesis of 2CT4-2-EtO has been described.

2CT4-2-EtO was first described in the literature by Shulgin in PiHKAL in 1991.

Editorial summary

Begin with the source’s own compact description: “2CT4-2-EtO” is pharmaceutical compound. The dossier treats that line as a proposition to test through 2CT4-2-EtO, pharmaceutical and compound, not as a finished interpretation.

Editorial reviewA dependable orientation record for establishing vocabulary, names and a first evidence trail. The current lead gives the account dated anchors—1991—that can be checked directly. The selected authority fields contribute no independent date. For this dossier, 2CT4-2-EtO, pharmaceutical and compound is the immediate research focus.
Editorial analysis

Why this record matters

The phrase “pharmaceutical compound” supplies a clear boundary for inquiry. It also exposes the unanswered questions: who defined that boundary, when it became stable and which sources sit outside it.

Evidence profile

Vocabulary and entity names are the principal evidence signals here, because they determine the precision of every later search. The source revision retrieved here is dated Apr 10, 2026. The linked authority identifier is Q139505711. None of the 0 selected statements returned an explicit reference. The first chronological checks are 1991.

Critical limits

The absence of detail may reflect summary conventions rather than a lack of surviving documentation. The source lead contains qualifying language; that uncertainty should survive quotation, summary and reuse. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.

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Source & attribution

This entry incorporates text from “2CT4-2-EtO” 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.