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Names | |
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Preferred IUPAC name
(2E)-3-Phenylprop-2-enal | |
Other names
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Identifiers | |
3D model (JSmol)
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3DMet | |
1071571 | |
ChEBI | |
ChEMBL | |
ChemSpider | |
DrugBank | |
ECHA InfoCard | 100.111.079 |
EC Number |
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KEGG | |
PubChem CID
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RTECS number |
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UNII | |
CompTox Dashboard (EPA)
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Properties | |
C9H8O | |
Molar mass | 132.16 g/mol |
Appearance | Yellow oil |
Odor | Pungent, cinnamon-like |
Density | 1.0497 g/mL |
Melting point | −7.5 °C (18.5 °F; 265.6 K) |
Boiling point | 248 °C (478 °F; 521 K) |
Slightly soluble | |
Solubility |
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−7.48×10−5 cm3/mol | |
Refractive index (nD)
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1.6195 |
Hazards | |
GHS labelling: | |
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Warning | |
H315, H317, H319, H335 | |
P261, P264, P271, P272, P280, P302+P352, P304+P340, P305+P351+P338, P312, P321, P332+P313, P333+P313, P337+P313, P362, P363, P403+P233, P405, P501 | |
NFPA 704 (fire diamond) | |
Flash point | 71 °C (160 °F; 344 K) |
Lethal dose or concentration (LD, LC): | |
LD50 (median dose)
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3400 mg/kg (rat, oral) |
Related compounds | |
Related compounds
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Cinnamic 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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Cinnamaldehyde is an organic compound with the formula or C₆H₅CH=CHCHO. Occurring naturally as predominantly the trans (E) isomer, it gives cinnamon its flavor and odor.[1] It is a phenylpropanoid that is naturally synthesized by the shikimate pathway.[2] This pale yellow, viscous liquid occurs in the bark of cinnamon trees and other species of the genus Cinnamomum. The essential oil of cinnamon bark is about 90% cinnamaldehyde.[3] Cinnamaldehyde decomposes to styrene because of oxidation as a result of bad storage or transport conditions. Styrene especially forms in high humidity and high temperatures. This is the reason why cinnamon contains small amounts of styrene.[4]
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