Caproleic acid: structure, properties, and food sources

Caproleic acid (10 carbon atoms) is an uncommon monounsaturated fatty acid (one cis double bond so in shorthand 10:1) member of the sub-group called medium chain fatty acids (MCFA) (from 6 to 12 carbon atoms).

Molecular weight: 170.24872 g/mol
Molecular formula: C10H18O2
IUPAC name: dec-9-enoic acid
CAS registry number: 14436-32-9
PubChem: 61743

Caproleic Acid
Fig. 1 – Dec-9-enoic Acid

In purified form it is a colorless clear liquid insoluble in water with boiling point at 269-271 °C (516.2-519.8 °F; 542.15-544.15 K) at 760 mm Hg.

Other names
9-decenoic acid
delta(9)-decenoic acid

Food sources of caproleic acid

It occurs as glycerol ester in animal fats like these present in milk, butter and Parmigiano.


  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