Behenic acid
Structural formula | ||||||||||||||||
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General | ||||||||||||||||
Surname | Behenic acid | |||||||||||||||
other names |
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Molecular formula | C 22 H 44 O 2 | |||||||||||||||
Brief description |
white crystalline powder |
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properties | ||||||||||||||||
Molar mass | 340.58 g mol −1 | |||||||||||||||
Physical state |
firmly |
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density |
0.8233 g cm −3 (90 ° C) |
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Melting point |
79.5-80.5 ° C |
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boiling point |
300 ° C |
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Vapor pressure |
<1 h Pa (20 ° C) |
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solubility |
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safety instructions | ||||||||||||||||
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Toxicological data | ||||||||||||||||
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions . |
Behenic acid is a chemical compound from the group of saturated higher fatty acids . The long-chain alkanoic acid belongs to the subgroup of wax acids .
Occurrence
Behenic acid occurs naturally in various plants, chemically bound as glycerol ester, in bark and leaf wax and in seed oils, for example in peanuts and rapeseed , but also in the beans of the coffee plant . It is noticeable that the acid in coffee bean oil was found almost exclusively as an ester with the two terpenes cafestol and kahweol . Behenic acid also occurs as a component of behen oil in the horseradish tree ( Moringa oleifera , not to be confused with horseradish ), the nickname "Behenbaum" is derived from. It is also contained in montan wax .
Behenate
Behenates (systematically also docosanoates ) are salts of behenic acid. Calcium behenate is used, for example, in the manufacture of tablets .
Individual evidence
- ↑ a b Entry on docosanoic acid in the GESTIS substance database of the IFA , accessed on June 17, 2017(JavaScript required) .
- ↑ a b David R. Lide (Ed.): CRC Handbook of Chemistry and Physics . 92nd edition. (Internet version: 2011), CRC Press / Taylor and Francis, Boca Raton, FL, Physical Constants of Organic Compounds, pp. 3-236.
- ↑ Walter Karrer : Constitution and occurrence of organic plant substances. Springer, 1958, ISBN 978-3-0348-6808-2 (reprint), p. 294.
- ↑ a b c d data sheet Behenic acid from Sigma-Aldrich , accessed on June 17, 2017 ( PDF ).
- ^ Entry on behenic acid in the Hazardous Substances Data Bank , accessed July 1, 2017.
- ↑ Docosanoic acid at PlantFA Database, accessed November 2, 2017.
- ↑ Occurrence of behenic acid .
- ↑ Oilseed rape in organic farming (PDF; 27 kB).
- ↑ Robert Hegnauer: Chemotaxonomy of plants: An overview of the distribution and the systematic importance of plant substances. Volume 21, Birkhäuser, 1973, ISBN 978-3-7643-0667-0 , p. 169.
- ↑ Axel M. Gressner, Torsten Arndt (Ed.): Lexicon of the Medical Laboratory Diagnostics . 2nd Edition. Springer, Berlin / Heidelberg 2013, ISBN 978-3-642-12921-6 , pp. 243 , entry on behenic acid , doi : 10.1007 / 978-3-642-12921-6 .
- ^ Carl Zerbe: Mineral oils and related products: Part 2, 2nd edition, Springer, 1969, ISBN 978-3-642-87510-6 , p. 595.
- ^ Franz von Bruchhausen: Hager's Handbook of Pharmaceutical Practice. Springer-Verlag, 1930, ISBN 978-3-540-52688-9 , p. 611 ( limited preview in Google book search).