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Not to be confused with cannabidiol or cannabinodiol.
Cannabinol 3D.png
Systematic (IUPAC) name
CAS Number 521-35-7 N
ATC code None
PubChem CID 2543
ChemSpider 2447 YesY
KEGG C07580 YesY
Chemical data
Formula C21H26O2
Molar mass 310.4319 g/mol
Physical data
Melting point 77 °C (171 °F) [4]
Solubility in water

insoluble in water[1]

soluble in methanol[2] and ethanol[3] mg/mL (20 °C)
 NYesY (what is this?)  (verify)

Cannabinol (CBN) is a weak psychoactive cannabinoid found only in trace amounts in Cannabis sativa and Cannabis indica.[5] It is mostly a metabolite of tetrahydrocannabinol (THC).[6] CBN acts as a weak agonist of CB1 receptors, but has a higher affinity to CB2 receptors, with lower affinities in comparison to THC.[7][8] Cannabinol has been shown to have analgesic properties.[9]

Unlike other cannabinoids, CBN does not stem from CBG, but is the degraded product of THC. If cannabis is exposed to air or ultraviolet light for a prolonged period of time, THCA will convert to CBNA. CBN is then formed by decarboxylation of CBNA.[10]


In contrast to THC, CBN has no double bond isomers nor stereoisomers.

Legal status[edit]

CBN is not scheduled by the United Nations' Convention on Psychotropic Substances.

United States[edit]

CBN is not scheduled at the federal level in the United States,[11] but it could legally be considered an analog of THC and sales or possession could be prosecuted under the Federal Analogue Act.

Cannabinol 10 mg transdermal patches
Cannabinol 10 mg transdermal patches sold at marijuana dispensaries in Colorado, USA


  1. ^ David R. Lide (2012). CRC Handbook of Chemistry and Physics. CRC Press. pp. 3–90. ISBN 1-43988049-2. 
  2. ^ Sigma-Aldrich Co., Cannabinol solution, 1.0 mg/mL in methanol, analytical standard, for drug analysis.
  3. ^ Biotrend: Cannabinol (PDF: 21 kB)
  4. ^ Cannabinol in the ChemIDplus database.
  5. ^ Karniol IG, Shirakawa I, Takahashi RN, Knobel E, Musty RE (1975). "Effects of delta9-tetrahydrocannabinol and cannabinol in man". Pharmacology 13 (6): 502–12. doi:10.1159/000136944. PMID 1221432. 
  6. ^ McCallum ND, Yagen B, Levy S, Mechoulam R (May 1975). "Cannabinol: a rapidly formed metabolite of delta-1- and delta-6-tetrahydrocannabinol". Experientia 31 (5): 520–1. doi:10.1007/bf01932433. PMID 1140243. 
  7. ^ Mahadevan A, Siegel C, Martin BR, Abood ME, Beletskaya I, Razdan RK (October 2000). "Novel cannabinol probes for CB1 and CB2 cannabinoid receptors". Journal of Medicinal Chemistry 43 (20): 3778–85. doi:10.1021/jm0001572. PMID 11020293. 
  8. ^ Petitet F, Jeantaud B, Reibaud M, Imperato A, Dubroeucq MC (1998). "Complex pharmacology of natural cannabinoids: evidence for partial agonist activity of delta9-tetrahydrocannabinol and antagonist activity of cannabidiol on rat brain cannabinoid receptors". Life Sciences 63 (1): PL1–6. doi:10.1016/S0024-3205(98)00238-0. PMID 9667767. 
  9. ^
  10. ^ Medical Jane, Cannabinol CBN
  11. ^ §1308.11 Schedule I.

External links[edit]

  • Erowid Compounds found in Cannabis sativa