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25B-NBOH Also known as:

  • 2-({[2-(4-Brom-2,5-dimethoxyphenyl)ethyl]amino}methyl)phenol[German][ACD/IUPAC Name]
  • 2-({[2-(4-Bromo-2,5-dimethoxyphenyl)ethyl]amino}methyl)phenol[ACD/IUPAC Name]
  • 2-({[2-(4-Bromo-2,5-diméthoxyphényl)éthyl]amino}méthyl)phénol[French][ACD/IUPAC Name]
  • Phenol, 2-[[[2-(4-bromo-2,5-dimethoxyphenyl)ethyl]amino]methyl]-[ACD/Index Name]

A phenethylamine psychedelic and stimulant derivative of 2C-B, this compound is related to and has similar effects to 25b-NBOMe. It is significantly more potent than 2C-B but less potent than 25B-NBOMe. Overdoses of NBOH compounds may cause dangerous vasoconstriction. May induce uncomfortable body load.


It is a closely related analog of 25B-NBOMe and is reported to share most of its properties with the exception of a moderately reduced potency and a shorter duration. The name 25B-NBOH, which is short-hand for 2C-B-NBOH, is a derivative of the phenethylamine psychedelic 2C-B. It was first synthesized and documented in 2011 by Martin Hansen at the University of Copenhagen.

It is worth noting that compounds of the NBOH family are not orally active and should be administered sublingually by placing and holding it into one’s mouth and allowing it to absorb over a period of 15-25 minutes. Extremely little is known about the pharmacological properties, metabolism, and toxicity of 25B-NBOH in humans. It has no history of human use before being sold online as a designer drug in 2011.

It is closely related to members of the 25x-NBOMe series, which have been associated with many hospitalizations and deaths. Anecdotal reports suggest that this substance may be difficult to use safely due to its highly sensitive dose-response and unpredictable effects.


25B-NBOH is a substituted phenethylamine with methoxy groups CH3O- attached to carbons R2 and R5 as well as an bromine atom attached to carbon R4.

It differs from 2C-B structurally through a substitution on the amine (NH2) with a 2-hydroxybenzyl (BOH) group.

25B-NBOH shares this 2-hydroxybenzyl substitution with other chemicals of the NBOH family.

This NBOH addition is comprised of a hydroxy ether OH- bound to a benzene ring at R2.

Common Name25B-NBOH
Systematic name25B-NBOH
Std. InChiInChI=1S/C17H20BrNO3/c1-21-16-10-14(18)17(22-2)9-12(16)7-8-19-11-13-5-3-4-6-15(13)20/h3-6,9-10,19-20H,7-8,11H2,1-2H3
Avg. Mass366.2496 Da
Molecular Weight366.2496
Monoisotopic Mass365.062653 Da
Nominal Mass365
ChemSpider ID58191433

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Dose Chart


Duration Chart

25B-NBOH Duration Data
Onset20-40 minutes
Duration4-10 hours
After-effects1-12 hours

Legal Status

  • Brazil: As of December 10, 2018, 25B-NBOH has been added to Portaria SVS/MS nº 344. Possession, distribution and use of this substance is now considered illegal.
  • Germany: 25B-NBOH is controlled under the NpSG (New Psychoactive Substances Act) as of November 26, 2016. Production and import with the aim to place it on the market, administration to another person and trading is punishable. Possession is illegal but not penalized.
  • Sweden: The Riksdag added 25B-NBOH to Narcotic Drugs Punishments Act under swedish schedule I ("substances, plant materials and fungi which normally do not have medical use") as of August 18, 2015, published by Medical Products Agency (MPA) in regulation HSLF-FS 2015:12
  • United Kingdom: 25B-NBOH is a Class A drug in the United Kingdom as a result of the N-benzylphenethylamine catch-all clause.
  • United States: 25B-NBOH is not a controlled substance in the United States but possession or distribution for human use could potentially be prosecuted under the Federal Analogue Act due to its structural and pharmacological similarities to 25B-NBOMe.
  • Sources


    1. 25C-NBOMe (2C-C-NBOMe) Fatalities / Deaths by Erowid |
    2. Martin Hansen (2011). "Design and Synthesis of Selective Serotonin Receptor Agonists for Positron Emission Tomography Imaging of the Brain." University of Copenhagen. Retrieved 27 June 2015.
    3. 25I-NBOMe (2C-I-NBOMe) Fatalities / Deaths by Erowid |
    4. 25C-NBOMe (2C-C-NBOMe) Fatalities / Deaths by Erowid |
    5. Other or Unknown NBOMe Compound Fatalities / Deaths by Erowid |
    6. Silva, M. E., Heim, R., Strasser, A., Elz, S., & Dove, S. (2011). Theoretical studies on the interaction of partial agonists with the 5-HT2A receptor. Journal of Computer-aided Molecular Design, 25(1), 51-66.
    7. Hansen, M.; Phonekeo, K.; Paine, J. S.; Leth-Petersen, S.; Begtrup, M.; Bräuner-Osborne, H.; Kristensen, J. L. (2014). "Synthesis and Structure-Activity Relationships of N-Benzyl Phenethylamines as 5-HT2A/2C Agonists". ACS Chemical Neuroscience. 5 (3): 243–9. PMC 3963123. PMID 24397362.
    8. 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. :10.1007/BF03161089.  1556-9039.
    9. List of controlled substances: Portaria SVS/MS nº 344 (Portuguese) |
    10. "Gesetz zur Bekämpfung der Verbreitung neuer psychoaktiver Stoffe" (PDF) (in German). Bundesanzeiger Verlag. Retrieved December 11, 2019.
    11. "Anlage NpSG" (in German). Bundesministerium der Justiz und für Verbraucherschutz. Retrieved December 11, 2019.
    12. "§ 4 NpSG" (in German). Bundesministerium der Justiz und für Verbraucherschutz. Retrieved December 11, 2019.
    14. United Kingdom. (2014). Misuse of Drugs Act 1971 (S.I. 2014/1106). London: The Stationery Office Limited. Retrieved July 5, 2017, from

    Information made possible with:

    1. PsychonautWiki is a community-driven online encyclopedia that aims to document the field of psychonautics in a comprehensive, scientifically-grounded manner.
    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

    Additional APIs were used to construct this information. Thanks to ChemSpider, NCBI, PubChem etc.

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