Arachidic acid

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Structural formula
Structural formula of arachidic acid
General
Surname Arachidic acid
other names
  • Icosanoic acid ( IUPAC )
  • Eicosanoic acid
  • n -eicosanoic acid
  • Arachidic acid
Molecular formula C 20 H 40 O 2
Brief description

white solid

External identifiers / databases
CAS number 506-30-9
EC number 208-031-3
ECHA InfoCard 100.007.302
PubChem 10467
Wikidata Q409608
properties
Molar mass 312.54 g mol −1
Physical state

firmly

density

0.824 g cm −3 (100 ° C)

Melting point

75.5 ° C

boiling point

328 ° C (decomposition)

solubility

practically insoluble in water

Refractive index

1.425 (100 ° C)

safety instructions
GHS labeling of hazardous substances
no GHS pictograms
H and P phrases H: no H-phrases
P: no P-phrases
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions . Refractive index: Na-D line , 20 ° C

Arachidic acid or eicosanoic acid is a chemical compound from the group of saturated higher fatty acids . It is a white fluffy solid that is stable under normal ambient conditions. The name arachidic acid is derived from the botanical name Arachis hypogaea for peanut . Their salts and esters are called arachinoates (systematically also eicosanoates ).

Occurrence

Arachidic acid is found esterified with glycerine in various edible oils , for example in peanut oil (1.5%), cocoa butter , soybean oil (0.5%), sunflower oil (0.5%) and rapeseed oil , as well as cottonseed oil and linseed oil . It occurs in the seed oils of very many plant species in concentrations of up to 45%. B. in Isanoöl ( Ongokea gore ) or in the seed fatty various Nephelium TYPES ( rambutan fat, Kusumöl, Pulasanfett) and the washing Nussbaum ( Sapindus saponaria ) to about 30%, or in the coconut ( Cocos nucifera ), and in nuclei of mango and from Pomegranate approx. 3%, watermelon ( Citrullus lanatus ) approx 4%, and real lime ( Citrus × aurantiifolia ) approx. 6–7%. But also in the cultivated apple ( Malus domestica ) it is sometimes found up to approx. 13%. It is also found in milk fat , animal fat and breast milk .

Extraction and presentation

Arachidonic acid, by hydrogenation of arachidonic acid are obtained.

properties

Icosan-1-ol can be obtained by reducing arachidic acid .

Individual evidence

  1. ↑ a b c d e Entry on eicosanoic acid in the GESTIS substance database of the IFA , accessed on May 9, 2017(JavaScript required) .
  2. ↑ David R. Lide (Ed.): CRC Handbook of Chemistry and Physics . 90th edition. (Internet version: 2010), CRC Press / Taylor and Francis, Boca Raton, FL, Physical Constants of Organic Compounds, pp. 3-228.
  3. ↑ Arachidic acid data sheet from Sigma-Aldrich , accessed on May 9, 2017 ( PDF ).
  4. ↑ Reinhard Lieberei, Christoph Reisdorff: Useful plants. 8th edition, Thieme, 2012, ISBN 978-3-13-530408-3 , p. 132.
  5. ↑ Eicosanoic acid (Arachidic acid) from PlantFA Database, accessed October 27, 2017.
  6. ↑ J. Schormüller : The components of food. Springer, 1965, ISBN 978-3-642-46012-8 , p. 320.

Web links

Wiktionary: arachidic acid  - explanations of meanings, word origins, synonyms, translations
Wiktionary: Eicosanoic acid  - explanations of meanings, word origins , synonyms, translations