Petroselinic acid
Petroselinic acid
Preferred IUPAC name
(6Z)-Octadec-6-enoic acid
Other names
(6Z)-Octadecenoic acid
(Z)-Octadec-6-enoic acid
cis-6-Octadecenoic acid
cis6-Octadecenoic acid
Petroselinic acid
18:1 cis-6
3D model (JSmol)
ECHA InfoCard 100.008.901 Edit this at Wikidata
EC Number
  • 209-789-8
  • InChI=1S/C18H34O2/c1-2-3-4-5-6-7-8-9-10-11-12-13-14-15-16-17-18(19)20/h12-13H,2-11,14-17H2,1H3,(H,19,20)/b13-12-
  • InChI=1/C18H34O2/c1-2-3-4-5-6-7-8-9-10-11-12-13-14-15-16-17-18(19)20/h12-13H,2-11,14-17H2,1H3,(H,19,20)/b13-12-
Molar mass 282.468 g·mol−1
Appearance White powder
Solubility in methanol Soluble
GHS labelling:[1]
GHS07: Exclamation mark
H315, H319, H335
P261, P264, P271, P280, P302+P352, P304+P340, P305+P351+P338, P312, P321, P332+P313, P337+P313, P362, P403+P233, P405, P501
Safety data sheet (SDS) MSDS from Sigma-Aldrich
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Petroselinic acid is a fatty acid that occurs naturally in several animal and vegetable fats and oils. It is a white powder and is commercially available.[2] In chemical terms, petroselinic acid is classified as a monounsaturated omega-12 fatty acid, abbreviated with a lipid number of 18:1 cis-6. It has the formula CH3(CH2)10CH=CH(CH2)4COOH. The term "petroselinic" means related to, or derived from, oil of Petroselinum, parsley. Despite its name, petroselinic acid does not contain any selenium. Petroselinic acid is a positional isomer of oleic acid.


Petroselinic was first isolated from parsley seed oil in 1909.[3] Petroselinic acid occurs in high amounts in plants in Apiaceae, Araliaceae,[4] Griselinia (Griseliniaceae)[5] and in Garryaceae.[6] In Picramniaceae, petroselinic acid is accompanied by tariric acid.[7] In addition, petroselinic acid has been found in minor amounts in several fats of plant and animal origin, including in human sources.[8]

The occurrence of petroselinic acid as the major fatty acid is used in chemosystematics as a proof of a close relationship of several families within the Apiales as well as within the Garryales.[9] Besides petroselinic acid, oleic acid has been shown to be present in all cases examined.

Production and chemical behavior

Fatty acids mostly occur as their esters, commonly the triglycerides, which are the greasy materials in many natural oils. Via the process of saponification, the fatty acids can be obtained.

The trans isomer of petroselinic acid is called petroselaidic acid.

In chemical analysis, petroselinic acid can be separated from other fatty acids by gas chromatography of methyl esters; additionally, a separation of unsaturated isomers is possible by argentation thin-layer chromatography.[10]


Petroselinic acid can be used in cosmetics.[11]


  1. ^ "Petroselinic acid". Retrieved 13 December 2021.
  2. ^ ChemicalBook
  3. ^ E. Vongerichten & A. Köhler (1909). "Über Petroselinsäure, eine neue Ölsäure". Berichte der Deutschen Chemischen Gesellschaft. 42 (2): 1638–1639. doi:10.1002/cber.19090420232.
  4. ^ F. C. Palazzo & A. Tamburello (1914). "Sopra l'acido iso-oleico dei semi di edera". Atti della Accademia Nazionale die Lincei. Rendiconti. Classe di Science Fisiche, Matematiche e Naturali. 5 (23): 352.
  5. ^ B. Breuer; T. Stuhlfauth; H. Fock; H. Huber (1987). "Fatty acids of some cornaceae, hydrangeaceae, aquifoliaceae, hamamelidaceae and styracaceae". Phytochemistry. 26 (5): 1441–1445. doi:10.1016/S0031-9422(00)81830-0.
  6. ^ R. Kleiman & G. Spencer (1982). "Search for new industrial oils". Journal of the American Oil Chemists' Society. 59: 29–38. doi:10.1007/BF02670064. S2CID 83792062.
  7. ^ M. Tsujimoto & H. Koyanagi (1933). "On Nigaki Oil". Bulletin of the Chemical Society of Japan. 8 (5): 161–167. doi:10.1246/bcsj.8.161.
  8. ^ Thomas Stuhlfauth (1984). "Chemosystematische Untersuchungen zur Fettsäurezusammensetzung von Frucht- und Samenölen der Pittosporaceen sowie einiger Arten der Rutales und Araliales, dissertation". University of Kaiserslautern, Germany: 52–55. ((cite journal)): Cite journal requires |journal= (help)
  9. ^ T. Stuhlfauth; H. Fock; H. Huber; . K. Klug (1985). "The distribution of fatty acids including petroselinic and tariric acids in the fruit and seed oils of the pittosporaceae, araliaceae, umbelliferae, simaroubaceae and rutaceae". Biochemical Systematics and Ecology. 13 (4): 447–453. doi:10.1016/0305-1978(85)90091-2.
  10. ^ B. Breuer, T. Stuhlfauth & H. P. Fock (1987). "Separation of fatty acids or methyl esters including positional and geometric isomers by alumina argentation thin-layer chromatography". Journal of Chromatographic Science. 25 (7): 302–306. doi:10.1093/chromsci/25.7.302. PMID 3611285.
  11. ^ Kosmetische Verwendung von Petroselinsäure, Patent DE69927466T3