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Arachidic acid

Arachidic acid
IUPAC name icosanoic acid
Other names eicosanoic acid
n-eicosanoic acid
arachidic acid
arachic acid
CAS number 506-30-9
PubChem 10467
Molecular formula C20H40O2
Molar mass 312.5304
Appearance white crystaline solid
Density 0.8240 g/cm3
Melting point

75.5 °C

Boiling point

328 °C

Except where noted otherwise, data are given for
materials in their standard state
(at 25 °C, 100 kPa)
Infobox disclaimer and references

Arachidic acid, also called eicosanoic acid, is a saturated fatty acid found in peanut oil. Its name derives from the Latin arachis — peanut. It can be formed by the hydrogenation of arachidonic acid. It is practically insoluble in water, and stable under normal conditions. It is a surfactant.

Reduction of arachidic acid yields arachidyl alcohol.


  • Merck Index, 11th Edition, 791.
  • Dorland's Medical Dictionary – 'A'. Retrieved on 2007-01-12.

This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Arachidic_acid". A list of authors is available in Wikipedia.
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