Psychedelic Research Chemicals or RC Chems are new synthetic substances which are structurally similar to the original drug, while being functional analogs. Data on their effects limited due as they’re fairly new and do not have a lot of human consumption history.

Psychedelics are substances (natural or laboratory made) which cause profound changes in a one’s perceptions of reality. While under the influence of hallucinogens, users might hallcuniate visually and auditorily.

Disclaimer: Psychedelic drugs offer some of the most powerful and intense psychological experiences. Additionally these substances are illegal in many places. We understand that even though these substances are illegal, their use occurs frequently. We do not condone breaking of the law. By providing accurate information about these substances, we encourage the user to make responsible decisions and practice harm reduction.

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Practice Harm Reduction. Proceed with Caution.


2C-I Also known as:

  • 2-(4-Iod-2,5-dimethoxyphenyl)ethanamin[German][ACD/IUPAC Name]
  • 2-(4-Iodo-2,5-dimethoxyphenyl)ethanamine[ACD/IUPAC Name]
  • 2-(4-Iodo-2,5-diméthoxyphényl)éthanamine[French][ACD/IUPAC Name]
  • 2C-I
  • 4-iodo-2,5-dimethoxy-β-phenethylamine
  • Benzeneethanamine, 4-iodo-2,5-dimethoxy-[ACD/Index Name]
  • 2-(4-iodo-2,5-dimethoxy-phenyl)ethanamine
  • 2-(4-iodo-2,5-dimethoxy-phenyl)ethylamine
  • 2-(4-Iodo-2,5-dimethoxy-phenyl)-ethylamine
  • 2,5-Dimethoxy-4-iodo phenethylamine
  • 2-[4-(125i)iodo-2,5-dimethoxyphenyl]ethanamine
  • 2C-I[Japanese]
  • 4-Iodo-2,5-dimethoxyphenethylamine HCI
  • 4-Iodo-2,5-dimethoxy-phenylethylamine hydrochloride
  • '69587-11-7
  • phenethylamine, 2,5-dimethoxy-4-iodo-

A psychedelic similar to the more well-known 2C-B. Users frequently report very vivid and bright open-eye visuals and more mild closed-eye visuals compared to 2C-B and other drugs in the 2C family. Can also be more stimulating than 2C-B along with having a slight body load for some users. Less safe at high doses compared to 2C-B


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-I was first synthesized and investigated for human activity by Alexander Shulgin in 1976 and later described in his 1991 book PiHKAL ("Phenethylamines I Have Known and Loved"). Its PiHKAL entry notes it for being "very colorful and active" but without "feelings of insight, revelation, or progress toward the true meaning of the universe.

" It first briefly gained some popularity in the late 1990s and early 2000s, where it was sold in several smart shops as a replacement for 2C-B following its scheduling in 1995. It also has a history of being sold online as a research chemical before becoming scheduled. 2C-I is typically used recreationally for its psychedelic as well as moderate stimulating and entactogenic effects.

It has been explored as a potential stimulant nootropic in the 1-8mg dosage range. Little data exists about the pharmacological properties, metabolism, and toxicity of 2C-I, and it has a limited history of human use. 2C-I is sometimes confused for the analog 25I-NBOMe (an abbreviated form of 2C-I-NBOMe).

It is highly advised to use harm reduction practices if using this substance.




2C-I contains methoxy functional groups CH3O- attached to carbons R2 and R5 as well as an iodine atom attached to carbon R4 of the phenyl ring.

2C-I belongs to the 2C family of phenethylamines which contain methoxy groups on the 2 and 5 positions of the benzene ring.

Std. InChiInChI=1S/C10H14INO2/c1-13-9-6-8(11)10(14-2)5-7(9)3-4-12/h5-6H,3-4,12H2,1-2H3
Avg. Mass307.1281 Da
Molecular Weight307.1281
Monoisotopic Mass307.006927 Da
Nominal Mass307
ChemSpider ID8442670

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Dose Chart


Duration Chart

Onset45-120 minutes
Duration4-12 hours
After-effects4-12 hours



  1. Mescaline
  2. DOx
  3. NBOMes
  4. 2C-T-x
  5. 5-MeO-xxT
    • The 5-MeO psychedelics can interact unpredictably to potentiate other psychedelics
  6. Cannabis
    • Cannabis has an unexpectedly strong and somewhat unpredictable synergy with psychedelics.
  7. Amphetamines
    • The anxiogenic and focusing effects of stimulants increase the chance of unpleasant thought loops. The combination is generally uneccessary because of the stimulating effects of psychedelics. Combination of the stimulating effects may be uncomfortable.
  8. Cocaine
    • The anxiogenic and focusing effects of stimulants increase the chance of unpleasant thought loops. The combination is generally unnecessary because of the stimulating effects of psychedelics. Combination of the stimulating effects may be uncomfortable.
  9. MAOIs
    • MAO-B inhibitors can increase the potency and duration of phenethylamines unpredictably


  1. Tramadol
    • Tramadol is well known to lower seizure threshold and psychedelics raise the risk of seizures.

No Synergy

  1. Caffeine
    • High doses of caffeine may cause anxiety which is less manageable when tripping, and since both are stimulating the combination may cause some physical discomfort.
  2. Opioids

Auditory Effects

Psychological Effects

The head space of 2C-I is described by many as one which is relatively normal in its thought processes even at moderate to high doses. It is often said to lack insight when compared to that of 2C-E, psilocin and LSD.

Pharmacological Effects

2C-I’s psychedelic effects are believed to come from its efficacy at the 5-HT2A receptor as a partial agonist. However, the role of these interactions and how they result in the psychedelic experience remains the subject of ongoing scientific investigation.

Physical Effects

  • Stimulation - In terms of its effects on the physical energy levels of the user, 2C-I is usually considered to be very energetic and stimulating in a fashion that is quite comparable to MDMA, although it is 'encouraged' instead of 'forced'.
  • Spontaneous physical sensations - The "body high" of 2C-I is manifested as one of the most proportionally intense in comparison to almost all of the classical psychedelics. The sensation itself can be described as an intense and slightly uncomfortable energetic pins and needles sensation that constantly encompasses a person’s entire body. It is usually felt over every square inch of the skin but occasionally manifests itself in the form of a continuously shifting, tingling sensation that travels up and down the body in spontaneous waves. Alongside this, many users commonly report that the "body high" can be particularly uncomfortable and sometimes accompanied by dysphoric aches and urges to shift the position of one's body and prolonged tensing of unusual combinations of muscle groups.
    • Physical euphoria - Feelings of frequent but unpredictable rushes of warm physical euphoria are extremely common. These can move from the top of the head downwards before enveloping one's whole body.
  • Tactile enhancement
  • Bodily control enhancement
  • Stamina enhancement
  • Increased heart rate
  • Temperature regulation suppression
  • Muscle contractions
  • Muscle cramps
  • Muscle spasms
  • Appetite suppression
  • Dehydration
  • Frequent urination
  • Nausea - Mild to extreme nausea is consistently reported when consumed in moderate to high doses and either passes once the user has vomited or gradually fades by itself as the peak sets in.
  • Pupil dilation

Sensory Effects

  • Synaesthesia - In its fullest manifestation, this is a very rare and non-reproducible effect. Increasing the dosage can increase the likelihood of this occurring, but seems to only be a prominent part of the experience among those who are already predisposed to synaesthetic states.

Subjective Effects

Disclaimer: The effects listed below are cited from the Subjective Effect Index (SEI), which relies on assorted anecdotal reports and the personal experiences of PsychonautWiki contributors. As a result, they should be taken with a healthy amount of skepticism. It is worth noting that these effects will not necessarily occur in a consistent or reliable manner, although higher doses (common+) are more likely to induce the full spectrum of reported effects. Likewise, adverse effects become much more likely on higher doses and may include serious injury or death.

Visual Effects




The visual geometry that is present throughout this trip can be described as more similar in appearance to that of LSD or 2C-B than that of 2C-E, psilocin, or ayahuasca although it is much blander and less detailed. They can be comprehensively described as unstructured in their organization, algorithmic in geometric style, intricate in complexity, large in size, fast and smooth in motion, colorful in scheme, glossy in color, both soft and sharp in their edges as well as equally rounded and angular in their corners. They seem high in algorithmic visuals such as fractals and at higher doses are significantly more likely to result in states of level 8A visual geometry over level 8B.

Hallucinatory states

Like LSD, while 2C-I is capable of producing a full range of low and high level hallucinatory states, this is extremely rare and inconsistent at higher levels but common at lower ones.

Legal Status

  • Austria: 2C-I is illegal to possess, produce and sell under the SMG. (Suchtmittelgesetz Österreich)
  • Brazil: Possession, production and sale is illegal as it is listed on Portaria SVS/MS nº 344.
  • Canada: 2C-I is a schedule III controlled substance in Canada.
  • Denmark: 2C-I is a controlled substance in Denmark.
  • European Union: In December 2003, the European Council issued a binding order compelling all EU member states to ban 2C-I within three months.
  • Germany: 2C-I is controlled under Anlage I BtMG (Narcotics Act, Schedule I) as of October 10, 1999. It is illegal to manufacture, possess, import, export, buy, sell, procure or dispense it without a license.
  • Greece: 2C-I is a controlled substance in Greece.
  • Ireland: 2C-I is a controlled substance in Ireland.
  • Italy: 2C-I is a controlled substance in Italy.
  • Latvia: 2C-I is a Schedule I controlled substance Latvia.
  • The Netherlands: 2C-I is a controlled substance in the Netherlands.
  • Poland: 2C-I is a controlled substance in Poland.
  • Sweden: Sveriges riksdag added 2C-I to Schedule I ("substances, plant materials and fungi which normally do not have medical use") as a narcotic in Sweden as of March 16, 2004.
  • Switzerland: Possession, production and sale is illegal.
  • United Kingdom: 2C-I is a Class A drug in the United Kingdom as a result of the phenethylamine catch-all clause.
  • United States: As of July 9, 2012, 2C-I is a Schedule I substance in the U.S. under the Synthetic Drug Abuse Prevention Act of 2012, making possession, distribution and manufacture illegal.
  • Sources


    1. Alexander Shulgin - PiHKAL |
    2. Shulgin, Alexander. "Pharmacology Lab Notes #1". Lafayette, CA. (1960-1976). p179 ( |
    3. Shulgin, A., & Shulgin, A. (1991). IsomerDesign: "PiHKAL" - #33 - 2C-I. Retrieved Jan 22, 2018.
    6. Talaie, H., Panahandeh, R., Fayaznouri, M. R., Asadi, Z., & Abdollahi, M. (2009). Dose-independent occurrence of seizure with tramadol. Journal of medical toxicology, 5(2), 63-67. doi:10.1007/BF03161089
    8. Regulations Amending the Food and Drug Regulations (Part J — 2C-phenethylamines)
    9., Legal Status of 2C-I
    10. "Dreizehnte Verordnung zur Änderung betäubungsmittelrechtlicher Vorschriften" (in German). Bundesanzeiger Verlag. Retrieved December 10, 2019.
    11. "Anlage I BtMG" (in German). Bundesministerium der Justiz und für Verbraucherschutz. Retrieved December 10, 2019.
    12. "§ 29 BtMG" (in German). Bundesministerium der Justiz und für Verbraucherschutz. Retrieved December 10, 2019.
    13. Noteikumi par Latvijā kontrolējamajām narkotiskajām vielām, psihotropajām vielām un prekursoriem (2,5-Dimetoksifeniletānamīni) |
    16. United Kingdom. (1977). Misuse of Drugs Act 1971 (S.I. 1977/1243). London: The Stationery Office Limited. Retrieved July 5, 2017, from

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    2. Erowid is a non-profit educational & harm-reduction resource with 60 thousand pages of online information about psychoactive drugs
    3. PubChem National Center for Bio Informatics
    4. Chemspider is a free chemical structure database providing fast access to over 34 million structures, properties and associated information.
    5. Wikipedia

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    Data is constantly updated so please check back later to see if there is any more available information on this substance.