Eleostearic acid

Structural formula
	; ;
	α -leostearic acid (top) and β -leostearic acid (bottom)
General
Surname	Eleostearic acid
other names	(9 Z , 11 E , 13 E ) Octadeca-9,11,13-trienoic acid; (9 E , 11 E , 13 E ) Octadeca-9,11,13-trienoic acid; alpha-eleostearic acid; beta-eleostearic acid; α -ESA; β -ESA; Margarolic acid (obsolete); Eläomargaric acid (obsolete);
Molecular formula	C 18 H 30 O 2
External identifiers / databases
PubChem	5281115
Wikidata	Q2823322
properties
Molar mass	278.44 g mol −1
Physical state	firmly
density	0.9028 g cm −3 (at 50 ° C) ( alpha ); 0.8839 g cm −3 (at 80 ° C) ( beta );
Melting point	49 ° C ( alpha ); 71.5 ° C ( beta );
boiling point	235 ° C; Decomposition ( alpha ); 188 ° C ( beta );
Refractive index	1.5112 (at 50 ° C) ( alpha ); 1.5000 (at 80 ° C) ( beta );
safety instructions
GHS hazard labeling ; no classification available
GHS hazard labeling ; no classification available
	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

The eleostearic acid or eleostearic acid , and eleostearic acid , is a conjugated and tri-unsaturated fatty acid from the group of omega-5 fatty acids . It is a trienoic acid in the group of trans fatty acids , it is also one of the conjugated linolenic acids (CLN).

There are two isomeric forms: (9 Z , 11 E , 13 E ) α -leostearic acid and all- trans - (9 E , 11 E , 13 E ) β -leostearic acid.

Bitter melons ( Momordica charantia )

The α -Eleostearinsäure is esterified as triacylglycerol in the tung oil from Vernicia TYPES (Syn: Aleurites ), in the seeds of Momordica charantia ( Momordica spp.) And Gold prune plants ( Parinari spp.) As well as euphorbia Garcia nutans and Ricinocarpos bowmanii in high amounts up over 60% before. It is also found in pomegranate seed oil , but in much smaller amounts. Under the action of light, the α -leostearic acid in the seed oils is isomerized to form β -leostearic acid in smaller quantities.

Individual evidence

↑ ^a ^b W. Karrer : Constitution and occurrence of organic plant matter. Springer, 1958, ISBN 978-3-0348-6795-5 , p. 312 f.
↑ ^a ^b ^c ^d ^e ^f David R. Lide (Ed.): CRC Handbook of Chemistry and Physics . 95th edition. (Internet version: 2015), CRC Press / Taylor and Francis, Boca Raton, FL, Physical Constants of Organic Compounds, pp. 3-424.
↑ ^a ^b David R. Lide (Ed.): CRC Handbook of Chemistry and Physics . 93rd edition. (Internet version: 2012), CRC Press / Taylor and Francis, Boca Raton, FL, Biochemistry, pp. 7-8.
↑ This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.
↑ 9,11,13-Octadecatrienoic acid, (9Z, 11E, 13E) on PlantFa Database, accessed October 24, 2017.
↑ 9,11,13-Octadecatrienoic acid (beta-Eleostearic acid) ( Page no longer available , search in web archives ) Info: The link was automatically marked as defective. Please check the link according to the instructions and then remove this notice. on PlantFa Database, accessed October 24, 2017.@1@ 2

^ Joan S. Hoffmann, W. G Bickford: New tung oil derivatives. United States Agricultural Research Service, 1956, pp. 1 f, archive.org .

^ Central office for scientific and technical research work of the Siemens group: Scientific publications from the Siemens group. Volume IV, Issue 2, Springer, 1925, ISBN 978-3-662-22753-4 , p. 295.

[Karr-1] W. Karrer : Constitution and occurrence of organic plant matter. Springer, 1958, ISBN 978-3-0348-6795-5 , p. 312 f.

[CRC2-2] ↑ ^a ^b ^c ^d ^e ^f David R. Lide (Ed.): CRC Handbook of Chemistry and Physics . 95th edition. (Internet version: 2015), CRC Press / Taylor and Francis, Boca Raton, FL, Physical Constants of Organic Compounds, pp. 3-424.

[CRC-3] David R. Lide (Ed.): CRC Handbook of Chemistry and Physics . 93rd edition. (Internet version: 2012), CRC Press / Taylor and Francis, Boca Raton, FL, Biochemistry, pp. 7-8.

[NV-4] This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.

[5] 9,11,13-Octadecatrienoic acid, (9Z, 11E, 13E) on PlantFa Database, accessed October 24, 2017.

[6] 9,11,13-Octadecatrienoic acid (beta-Eleostearic acid) ( Page no longer available , search in web archives ) Info: The link was automatically marked as defective. Please check the link according to the instructions and then remove this notice. on PlantFa Database, accessed October 24, 2017.@1@ 2

[7] Joan S. Hoffmann, W. G Bickford: New tung oil derivatives. United States Agricultural Research Service, 1956, pp. 1 f, archive.org .

[8] Central office for scientific and technical research work of the Siemens group: Scientific publications from the Siemens group. Volume IV, Issue 2, Springer, 1925, ISBN 978-3-662-22753-4 , p. 295.