Names | |
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IUPAC names
3-(3,4-Dihydroxyphenyl)-2-propenoic acid
3,4-Dihydroxycinnamic acid trans-Caffeate 3,4-Dihydroxy-trans-cinnamate (E)-3-(3,4-dihydroxyphenyl)-2-propenoic acid 3,4-Dihydroxybenzeneacrylicacid 3-(3,4-Dihydroxyphenyl)-2-propenoic acid | |
Preferred IUPAC name
(2E)-3-(3,4-Dihydroxyphenyl)prop-2-enoic acid | |
Identifiers | |
3D model (JSmol)
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1954563 | |
ChEBI | |
ChEMBL | |
ChemSpider | |
DrugBank | |
ECHA InfoCard | 100.005.784 |
EC Number |
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KEGG | |
PubChem CID
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UNII | |
CompTox Dashboard (EPA)
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Properties | |
C9H8O4 | |
Molar mass | 180.16 g/mol |
Density | 1.478 g/cm3 |
Melting point | 223 to 225 °C (433 to 437 °F; 496 to 498 K) |
UV-vis (λmax) | 327 nm and a shoulder at c. 295 nm in acidified methanol[1] |
Hazards | |
GHS labelling: | |
Warning | |
H315, H319, H335, H351, H361 | |
P201, P202, P261, P264, P271, P280, P281, P302+P352, P304+P340, P305+P351+P338, P308+P313, P312, P321, P332+P313, P337+P313, P362, P403+P233, P405, P501 | |
NFPA 704 (fire diamond) | |
Related compounds | |
Related compounds
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Chlorogenic acid Cichoric acid Coumaric acid Quinic acid |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Caffeic acid is an organic compound with the formula (HO)2C6H3CH=CHCO2H. It is a polyphenol. It is a yellow solid. Structurally, it is classified as a hydroxycinnamic acid. The molecule consists of both phenolic and acrylic functional groups. It is found in all plants as an intermediate in the biosynthesis of lignin, one of the principal components of biomass and its residues.[2] It is unrelated to caffeine.
Boerjan
was invoked but never defined (see the help page).