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Fatty acids
Margaric acid
Другие языки:

Margaric acid

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Margaric acid
Heptadecanoic acid
Heptadecanoic-acid-3D-balls.png
Names
Preferred IUPAC name
Heptadecanoic acid
Other names
Heptadecylic acid;
Daturic acid;
Margarinic acid;
17:0 (Lipid numbers)
Identifiers
3D model (JSmol)
1781004
ChEBI
ChEMBL
ChemSpider
ECHA InfoCard 100.007.298
EC Number
  • 208-027-1
253195
PubChem CID
UNII
  • InChI=1S/C17H32O2/c1-2-3-4-5-6-7-8-9-10-11-12-13-14-15-16-17(18)19/h2-16H2,1H3,(H,18,19) checkY
    Key: KEMQGTRYUADPNZ-UHFFFAOYSA-N checkY
  • InChI=1/C17H32O2/c1-2-3-4-5-6-7-8-9-10-11-12-13-14-15-16-17(18)19/h2-16H2,1H3,(H,18,19)
    Key: KEMQGTRYUADPNZ-UHFFFAOYAT
  • O=C(O)CCCCCCCCCCCCCCCC
Properties
C17H34O2
Molar mass 270.45 g/mol
Appearance White crystals
Density 0.853 g/cm3
Melting point 61.3 °C (142.3 °F; 334.4 K)
Boiling point 227 °C (441 °F; 500 K) 100 mmHg
insoluble
Hazards
GHS labelling:
GHS07: Exclamation mark
Warning
H315, H319, H335
P261, P264, P271, P280, P302+P352, P304+P340, P305+P351+P338, P312, P321, P332+P313, P337+P313, P362, P403+P233, P405, P501
Related compounds
Related fatty acids
Palmitic acid
Stearic acid
Related compounds
 Heptadecanol
Heptadecanal
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
checkY verify (what is checkY☒N ?)

Margaric acid, or heptadecanoic acid, is a saturated fatty acid. Its molecular formula is CH3(CH2)15CO2H. Classified as an odd-chain fatty acid, it occurs as a trace component of the fat and milkfat of ruminants.Salts and esters of margaric acid are called heptadecanoates.

Its name is derived from the Ancient Greek μάργαρος (márgar(on)), meaning "pearl(y)", due to its appearance.

Semiochemistry

For many species, margaric acid plays a role as a semiochemical - specifically it possesses pheromonic and allomonic properties. Margaric acid has been identified in the subcaudal gland secretions of the European badger (Meles meles) and in the occipital gland secretions of male Bactrian camels (Camelus bactrianus) where it is one of the many pheromonic chemicals responsible for aiding in the finding and selection of mates.

Margaric acid is an attractant of the khapra beetle (Trogoderma granarium) and the yellow fever mosquito (Aedes aegypti) but is a repellent of the common house mosquito (Culex pipiens).

Margaric acid is also found in the precloacal gland secretions of many reptiles belonging to the order squamata, including the common leopard gecko (Eublepharis macularius) and the European viper (Vipera berus), where it is used for the identification of sexual partners.

Unsaturated forms

Unsaturated derivatives of margaric acid are found in nature, although rarely. Unsaturation occurs at position 9 or both at 9 and 12 positions of the fatty chain giving heptadecenoic (C17:1) and heptadecadienoic (C17:2) acids, respectively. C17:1 cis-9 (ω-8) is found at trace amounts in ruminant fats and some varieties of olive oils. Minor amounts (< 1%) of C17:1 cis-10 and C17:2 cis-8,11 were detected in seed oil of Portia tree (Thespesia populnea).

Rarity in vegetable and animal fats

Margaric acid is rare in animals and vegetables. In the 19th and early 20th centuries, however, the acid was often identified as a significant component of natural fats. Most likely, these were cases of misidentifying a eutectic mixture of palmitic and stearic acids.

See also

External links


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