Elaidic acid

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Elaidic acid
IUPAC name
(E)-octadec-9-enoic acid
Other names
(E)-9-Octadecenoic acid,
3D model (JSmol)
ECHA InfoCard 100.003.642
Molar mass 282.46 g/mol
Appearance colorless waxy solid
Density 0.8734 g/cm3
Melting point 45 °C (113 °F)
-204.8·10−6 cm3/mol
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references

Elaidic acid is the organic compound with the formula CH3(CH2)7CHCH(CH2)7CO2H. Classified as an unsaturated trans fatty acid, it is a colorless oily solid. This compound has attracted attention because it is a major trans fat found in hydrogenated vegetable oils, and trans fats are implicated in heart disease.[1]

It is the trans isomer of oleic acid. The name of the elaidinization reaction comes from elaidic acid.

Occurrence and bioactivity[edit]

Elaidic acid occurs naturally in small amounts in caprine and bovine milk (very roughly 0.1% of the fatty acids)[2] and in some meats.[3] It also comprises 2.50% of the fats from the fruit of the durian species Durio graveolens.[4]

Elaidic acid increases plasma cholesterylester transfer protein (CETP) activity which lowers HDL cholesterol.[5]

See also[edit]


  1. ^ Tardy, Anne-Laure; Morio, Béatrice; Chardigny, Jean-Michel; Malpuech-Brugère, Corinne (2011). "Ruminant and industrial sources of trans-fat and cardiovascular and diabetic diseases". Nutrition Research Reviews. 24 (1): 111–7. doi:10.1017/S0954422411000011. PMID 21320382.
  2. ^ Alonso L, Fontecha J, Lozada L, Fraga MJ, Juárez M (1999). "Fatty acid composition of caprine milk: major, branched-chain, and trans fatty acids". J. Dairy Sci. 82 (5): 878–84. doi:10.3168/jds.S0022-0302(99)75306-3. hdl:10261/113439. PMID 10342226.
  3. ^ William Stillwell (2016). Membranes and Human Health. An Introduction to Biological Membranes (Second ed.).
  4. ^ Nasaruddin, Mohd hanif; Noor, Noor Qhairul Izzreen Mohd; Mamat, Hasmadi (2013). "Komposisi Proksimat dan Komponen Asid Lemak Durian Kuning (Durio graveolens) Sabah" [Proximate and Fatty Acid Composition of Sabah Yellow Durian (Durio graveolens)] (PDF). Sains Malaysiana (in Malay). 42 (9): 1283–1288. ISSN 0126-6039. OCLC 857479186. Retrieved 28 November 2017.
  5. ^ Abbey M, Nestel PJ (1994). "Plasma cholesteryl ester transfer protein activity is increased when trans-elaidic acid is substituted for cis-oleic acid in the diet". Atherosclerosis. 106 (1): 99–107. doi:10.1016/0021-9150(94)90086-8. PMID 8018112.