Heneicosylic acid

• N- heneicosanoic
• Henicosansäure

Colorless needles

Fixed

74-75 ° C

• Almost insoluble in water
• Soluble in hot acetone, benzene, chloroform, acetic acid, ether

Attention

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The heneicosanoic is a saturated long-chain fatty acid with an odd number of carbon atoms and belongs to the group of alkanoic acids.

Occurrence

Like most long-chain fatty acids with odd carbon number comes heneicosanoic in nature only rarely and in low concentration.

It has been proven this fatty acid in the human milk fat to 0.24% of the fatty acids in fungi of the genus Armillaria to 4-5 % of the fatty acids as well as in a few plants.

She comes to 0.72% of the fatty acids present in the oil from seeds of Azadirachta excelsa, a relative of the Indian neem tree, and to 2.26% of the fatty acids in the seeds of Mucuna flagellipes, a legume in India for their suitability has been studied as an animal feed. In the same study no heneicosanoic could be found in four other Mucuna species.

In some microorganisms, such as Rickettsia typhi and Rickettsia prowazekii she comes chemically bound before a lipopolysaccharide.

Production and representation

Heneicosanoic acid can be prepared by oxidation of 1- docosene with potassium permanganate.

Use

Because of their rarity and their low levels in biological materials, it is - as tridecanoate and nonadecanoic - often used in the gas chromatographic analysis of fatty acids as an internal standard (for example ).