Cerotic acid
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| General | ||||||||||||||||
| Surname | Cerotic acid | |||||||||||||||
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| Molecular formula | C 26 H 52 O 2 | |||||||||||||||
| Brief description |
white to beige-colored, crystalline solid |
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| properties | ||||||||||||||||
| Molar mass | 396.70 g mol −1 | |||||||||||||||
| Physical state |
firmly |
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| density |
0.8198 g cm −3 (100 ° C ) |
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| Melting point |
87.7-88.5 ° C |
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| solubility |
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| Refractive index |
1.4301 (100 ° C) |
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| 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 | ||||||||||||||||
Cerotic acid (according to IUPAC hexacosanoic acid ) is a chemical compound from the group of saturated higher fatty acids . It belongs to the subgroup of wax acids . The name is derived from the Latin Cera (= wax). Their salts and esters are systematically called hexacosanoates .
Occurrence
Cerotic acid occurs with the longer-chain melissic acid as cerin in beeswax (14–15%). There it is found in free form alongside numerous esters of long-chain acids and alcohols. There are other occurrences in carnauba wax , montan wax , china wax and wool sweat . It is also found in various plant lipids.
properties
Cerotic acid is a white to beige colored, crystalline powder with a melting point of approx. 88 ° C and is practically insoluble in water.
Individual evidence
- ↑ a b c Entry on cerotic acid. In: Römpp Online . Georg Thieme Verlag, accessed on November 5, 2017.
- ↑ a b c d data sheet cerotic acid from Sigma-Aldrich , accessed on February 13, 2013 ( 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. 3-278.
- ^ Albin H. Warth: The Chemistry and Technology of Waxes. Second Edition, Reinhold Publ., 1956, p. 34, online at babel.hathitrust.org, accessed on November 5, 2017.
- ↑ Cerotic acid data sheet at Acros, accessed on March 29, 2010.
- ↑ a b Bavarian State Institute for Viticulture and Horticulture: Beeswax. ( Memento of April 6, 2013 in the Internet Archive ) (PDF; 50 kB).
- ↑ HM Rauen: Biochemical Pocket Book. 2nd edition, Springer, 1964, ISBN 978-3-642-85768-3 (reprint), p. 223.
- ↑ Hexacosanoic 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. at PlantFA Database, accessed November 5, 2017.
