Hashish-XIII. On the nature of the beam test

R. Mechoulam, Z. Ben-Zvi, Y. Gaoni

Research output: Contribution to journalArticlepeer-review

49 Scopus citations


The purple colour produced by treatment of cannabidiol (I) with 5% ethanolic potassium hydroxide (Beam test) is due to the anions of the hydroxy-quinone II and its dimer III. Compounds II and III are formed from I by air oxidation during the reaction. The quinone III is reduced in the mass spectrometer to a M+ + 4 species (probably the dihydroquinone).

Original languageEnglish
Pages (from-to)5615-5624
Number of pages10
Issue number16
StatePublished - 1 Jan 1968
Externally publishedYes

ASJC Scopus subject areas

  • Biochemistry
  • Drug Discovery
  • Organic Chemistry


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