Angelic acid
From Wikipedia, the free encyclopedia
| Angelic acid | |
|---|---|
 |
|
| IUPAC name |
(Z)-2-methylbut-2-enoic acid
|
| Identifiers | |
| CAS number | 565-63-9 |
| PubChem | 643915 |
| SMILES |
C/C=C(C)\C(O)=O
|
| Properties | |
| Molecular formula | C5H8O2 |
| Molar mass | 100.12 g mol−1 |
| Melting point |
45.5 °C, 319 K, 114 °F |
| Boiling point |
185 °C, 458 K, 365 °F |
| Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) | |
| Infobox references | |
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]
