Montanic acid

Structural formula
General
Surname	Montanic acid
other names	Octacosanoic acid; n- octacosanoic acid;
Molecular formula	C 28 H 56 O 2
Brief description	white flakes
External identifiers / databases
EC number	208-041-8
ECHA InfoCard	100.007.311
PubChem	10470
Wikidata	Q911196
properties
Molar mass	424.76 g mol −1
Physical state	firmly
density	0.8191 (100 ° C )
Melting point	91-93 ° C
Refractive index	1.4313 (100 ° C)
safety instructions
GHS labeling of hazardous substances	no GHS pictograms
	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

Montanic acid ( n- octacosanoic acid) is a chemical compound from the group of saturated higher fatty acids . It belongs to the subgroup of wax acids . Their salts and esters are called montanoates (systematically also octacosanoates ).

Occurrence

Montanic acid and its esters with long-chain alcohols (C-24, C-26 and C-28) are contained in montan wax , which can be obtained by extraction from lignite .

properties

Montanic acid is a solid with a melting point of 91–93 ° C and is practically insoluble in water. The esters of montanic acid (montanic acid ester) were extracted from lignite; it is particularly well-cleaned bitumen. These acted as food additives (E 912) and were used as coating agents for fruits. Since October 1, 2014, montanic acid esters are no longer permitted as additives. They have similar properties to carnauba wax .

Individual evidence

↑ ^a ^b ^c ^d Datasheet Octacosanoic acid, synthetic, ≥98% from Sigma-Aldrich , accessed on December 26, 2019 ( PDF ).
↑ ^a ^b 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. 3-400.
↑ Entry on montan wax. In: Römpp Online . Georg Thieme Verlag, accessed on June 15, 2014.
^ K. Roth: Chemical delicacies . 1st edition. Wiley-VCH, Weinheim 2010, p. 150 .
↑ Regulation (EU) No. 957/2014 of the Commission .

Web links

Entry for Octacosanoic acid in the Human Metabolome Database (HMDB) , accessed September 24, 2013.
Hugh Ryan, Joseph Algar: Montanic Acid and Its Derivatives. In: Proceedings of the Royal Irish Academy. Section B: Biological, Geological, and Chemical Science , Vol. 30, 1912/1913, pp. 97-105.
Habsah Mohamad, Wan Ainur Najmiah Wan Abdul Jamil, Faridah Abas, Khamsah Suryati Mohamad, Abdul Manaf Ali: Octacosanoic Acid, Long Chains Saturated Fatty Acid from the Marine Sponges Xestospongia sp. In: Pertanika Journal of Tropical Agricultural Science. Volume 32, No. 1, 2009, pp. 51-55.
Regulation (EU) No. 957/2014 of the Commission of 10 September 2014 amending Annex II of Regulation (EC) No. 1333/2008 of the European Parliament and of the Council as well as the annex to Regulation (EU) No. 231/2012 the commission regarding the deletion of montanic acid ester (E 912)

[Sigma-1] Datasheet Octacosanoic acid, synthetic, ≥98% from Sigma-Aldrich , accessed on December 26, 2019 ( PDF ).

[CRC90_3_400-2] 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. 3-400.

[3] Entry on montan wax. In: Römpp Online . Georg Thieme Verlag, accessed on June 15, 2014.

[Roth-4] K. Roth: Chemical delicacies . 1st edition. Wiley-VCH, Weinheim 2010, p. 150 .

[5] Regulation (EU) No. 957/2014 of the Commission .