Angelic acid
From Wikipedia, the free encyclopedia
| Angelic acid | |
|---|---|
 |
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| IUPAC name | (Z)-2-methylbut-2-enoic acid |
| Identifiers | |
| CAS number | [565-63-9] |
| PubChem | |
| SMILES | CC=C(C)C(=O)O |
| Properties | |
| Molecular formula | C5H8O2 |
| Molar mass | 100.116 g/mol |
| Melting point |
45.5°C |
| Boiling point |
185°C |
| Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) Infobox disclaimer and references |
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Angelic acid is a monocarboxylic unsaturated organic acid. It is found in garden angelica (Angelica archangelica), Umbelliferae, and many other plants. It was also isolated from the defensive secretion of certain carabid beetles.
[edit] Properties and uses
Angelic acid has a double bond between the second and third carbons of the chain. Together with tiglic acid form a pair of cis-trans isomers. Angelic acid is a volatile body, of biting acid taste and pungent sour odour. It crystallizes in colorless monoclinic prisms. Angelic acid was formerly used therapeutically as a sedative.
[edit] Name and discovery
Angelic acid gets its name from the plant garden angelica (Angelica archangelica) from whose roots it was first obtained in 1842 by L. A. Buchner.[1]
[edit] References
- ^ L. A. Buchner L. Justus Liebigs Ann Chem. 1842;42:226.
