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2C-T-9: Wikis

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IUPAC name
CAS number 207740-28-1
ChemSpider ID 21106235
Molecular formula C14H23NO2S
Molar mass 269.40 g/mol
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
Infobox references

2C-T-9 is a psychedelic phenethylamine of the 2C family. It was first synthesized by Alexander Shulgin, sometimes used as an entheogen.



2C-T-9 is 2,5-dimethoxy-4-(n)-butylthiophenethylamine.

The IUPAC name of 2C-T-9 is 1-(4-(n-butylthio)-2,5-dimethoxyphenyl)-2-aminoethane.


In his book PiHKAL (Phenethylamines i Have Known And Loved), Shulgin lists the dosage range as 60 - 100 mg.

Subjective Qualities

It is generally taken orally, and effects typically last 12 to 18 hours.[1] There have been no reported deaths from 2C-T-9. The drug is said to taste like motor oil, and experiences have focused primarily on energy as opposed to creativity or insight.


The mechanism that produces 2C-T-9’s hallucinogenic and entheogenic effects has not been specifically established, however it is most likely to result from action as a 5-HT2A serotonin receptor agonist in the brain, a mechanism of action shared by all of the hallucinogenic tryptamines and phenethylamines for which the mechanism of action is known.


The toxicity of 2C-T-9 is not well documented. 2C-T-9 is considerably less potent than 2C-T-7, but it may be expected that at higher doses it would display similar toxicity to that of other phenethylamines of the 2C-T family. Other phenethylamine derivatives substituted with an alkylthio group at the 4 position such as 2C-T-7 and 4-MTA are known to act as selective monoamine oxidase A inhibitors, a side effect which can lead to lethal serotonin syndrome when they are combined with stimulant drugs. Most confirmed fatalities involving 2C-T drugs involve their combination with other hard drugs such as alcohol, ecstasy or cocaine.


2C-T-9 is not illegal, but possession and sales of 2C-T-9 could be prosecuted under the Federal Analog Act because of its structural similarities to 2C-T-7.


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