Columbinic acid: chemical structure and properties

Columbinic acid is a polyunsaturated fatty acid (PUFA) with 18 carbon atoms and three trans (E) double bounds (shorthand nomenclature cannot be used to name trans fatty acids), member of the sub-group called long chain fatty acids (LCFA), from 14 to 18 carbon atoms.

Molecular weight: 278.4296 g/mol
Molecular formula: C18H30O2
IUPAC name: (5E,9E,12E)-octadeca-5,9,12-trienoic acid
PubChem: 5312493

Skeletal formula of columbinic acid, a trans fatty acid
Columbinic Acid

5,9,12-octadecatrienoic acid
5,9,12-octadecatrienoic acid, (cis)-isomer
pinolenic acid
trans-5,9,12-octadecatrienoic acid


  1. Akoh C.C. and Min D.B. “Food lipids: chemistry, nutrition, and biotechnology” 3th ed. 2008
  2. Chow Ching K. “Fatty acids in foods and their health implication” 3th ed. 2008

Biochemistry, metabolism, and nutrition