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Record Information
Creation Date2014-10-14 21:19:45 UTC
Update Date2014-12-24 20:27:01 UTC
Accession NumberT3D4985
Common NameCinnamaldehyde
ClassSmall Molecule
DescriptionCinnamaldehyde is the aldehyde that gives cinnamon its flavor and odor. Cinnamaldehyde occurs naturally in the bark of cinnamon trees and other species of the genus Cinnamomum like camphor and cassia. These trees are the natural source of cinnamon, and the essential oil of cinnamon bark is about 90% cinnamaldehyde. Cinnamaldehyde is also used as a fungicide. Proven effective on over 40 different crops, cinnamaldehyde is typically applied to the root systems of plants. Its low toxicity and well-known properties make it ideal for agriculture. To a lesser extent, cinnamaldehyde is an effective insecticide, and its scent is also known to repel animals like cats and dogs. Cinnamaldehyde is also known as a corrosion inhibitor for steel and other ferrous alloys in corrosive fluids. It can be used in combination with additional components such as dispersing agents, solvents and other surfactants. Concentrated cinnamaldehyde is a skin irritant, and the chemical is toxic in large doses, but no agencies suspect the compound is a carcinogen or poses a long-term health hazard. Most cinnamaldehyde is excreted in urine as cinnamic acid, an oxidized form of cinnamaldehyde.
Compound Type
  • Food Toxin
  • Industrial/Workplace Toxin
  • Metabolite
  • Natural Compound
  • Pesticide
Chemical Structure
Cinnamic aldehyde
Cinnamyl aldehyde
trans-Cinnamic aldehyde
Chemical FormulaC9H8O
Average Molecular Mass132.159 g/mol
Monoisotopic Mass132.058 g/mol
CAS Registry Number104-55-2
IUPAC Name(2E)-3-phenylprop-2-enal
Traditional Namecinnamal
InChI IdentifierInChI=1S/C9H8O/c10-8-4-7-9-5-2-1-3-6-9/h1-8H/b7-4+
Chemical Taxonomy
Description belongs to the class of organic compounds known as cinnamaldehydes. These are organic aromatic compounds containing a cinnamlaldehyde moiety, consisting of a benzene and an aldehyde group to form 3-phenylprop-2-enal.
KingdomOrganic compounds
Super ClassPhenylpropanoids and polyketides
Sub ClassNot Available
Direct ParentCinnamaldehydes
Alternative Parents
  • Cinnamaldehyde
  • Styrene
  • Benzenoid
  • Monocyclic benzene moiety
  • Enal
  • Alpha,beta-unsaturated aldehyde
  • Organic oxygen compound
  • Organic oxide
  • Hydrocarbon derivative
  • Organooxygen compound
  • Carbonyl group
  • Aldehyde
  • Aromatic homomonocyclic compound
Molecular FrameworkAromatic homomonocyclic compounds
External Descriptors
Biological Properties
StatusDetected and Not Quantified
Cellular Locations
  • Membrane
Biofluid LocationsNot Available
Tissue Locations
  • Neuron
  • Skin
PathwaysNot Available
ApplicationsNot Available
Biological RolesNot Available
Chemical RolesNot Available
Physical Properties
AppearanceNot Available
Experimental Properties
Melting Point-7.5 °C
Boiling Point248 C (478 F; 521 K)
Solubility1.42 mg/mL at 25 °C
Predicted Properties
Water Solubility0.41 g/LALOGPS
pKa (Strongest Basic)-4.4ChemAxon
Physiological Charge0ChemAxon
Hydrogen Acceptor Count1ChemAxon
Hydrogen Donor Count0ChemAxon
Polar Surface Area17.07 ŲChemAxon
Rotatable Bond Count2ChemAxon
Refractivity42.13 m³·mol⁻¹ChemAxon
Polarizability14.48 ųChemAxon
Number of Rings1ChemAxon
Rule of FiveYesChemAxon
Ghose FilterYesChemAxon
Veber's RuleYesChemAxon
MDDR-like RuleYesChemAxon
Spectrum TypeDescriptionSplash Key
GC-MSGC-MS Spectrum - GC-MS (Non-derivatized)splash10-0059-3900000000-52db83b595237437ab08View in MoNA
GC-MSGC-MS Spectrum - EI-B (Non-derivatized)splash10-0f89-5900000000-540c43f6893b35e8a105View in MoNA
GC-MSGC-MS Spectrum - EI-B (Non-derivatized)splash10-0f89-5900000000-482f8b5c30c53689d8ebView in MoNA
GC-MSGC-MS Spectrum - EI-B (Non-derivatized)splash10-001i-3900000000-9d274f5e3981ab662650View in MoNA
GC-MSGC-MS Spectrum - EI-B (Non-derivatized)splash10-001i-0900000000-4f0ad7748ac21b7320c9View in MoNA
GC-MSGC-MS Spectrum - EI-B (Non-derivatized)splash10-0f89-6900000000-ecaba4b9d657020c3f4cView in MoNA
GC-MSGC-MS Spectrum - CI-B (Non-derivatized)splash10-001i-0900000000-c02b7869dea8f1113cb4View in MoNA
GC-MSGC-MS Spectrum - EI-B (Non-derivatized)splash10-001i-2900000000-d89aa99ef7a6ae16b942View in MoNA
GC-MSGC-MS Spectrum - EI-B (Non-derivatized)splash10-0ugi-8900000000-14f14e29c81360ebdd4bView in MoNA
GC-MSGC-MS Spectrum - GC-MS (Non-derivatized)splash10-0059-3900000000-52db83b595237437ab08View in MoNA
Predicted GC-MSPredicted GC-MS Spectrum - GC-MS (Non-derivatized) - 70eV, Positivesplash10-0f89-4900000000-e9eb0053986096f21c83View in MoNA
LC-MS/MSLC-MS/MS Spectrum - Quattro_QQQ 10V, Positive (Annotated)splash10-0a59-5900000000-a125425df0f09bb01129View in MoNA
LC-MS/MSLC-MS/MS Spectrum - Quattro_QQQ 25V, Positive (Annotated)splash10-056r-9300000000-043ea317ed08a1cbacfbView in MoNA
LC-MS/MSLC-MS/MS Spectrum - Quattro_QQQ 40V, Positive (Annotated)splash10-004i-9000000000-39ab07ef5d737e851671View in MoNA
LC-MS/MSLC-MS/MS Spectrum - EI-B (HITACHI RMU-7M) , Positivesplash10-0f89-5900000000-f27dd11a8900d729bd19View in MoNA
LC-MS/MSLC-MS/MS Spectrum - EI-B (JEOL JMS-D-3000) , Positivesplash10-0f89-5900000000-4e11cf955911f9ca7da2View in MoNA
LC-MS/MSLC-MS/MS Spectrum - EI-B (SHIMADZU QP-1000) , Positivesplash10-001i-3900000000-9d274f5e3981ab662650View in MoNA
LC-MS/MSLC-MS/MS Spectrum - EI-B (SHIMADZU QP-1000) , Positivesplash10-001i-0900000000-4f0ad7748ac21b7320c9View in MoNA
LC-MS/MSLC-MS/MS Spectrum - EI-B (HITACHI RMU-6M) , Positivesplash10-0f89-6900000000-e363e674a4ec6e092f26View in MoNA
LC-MS/MSLC-MS/MS Spectrum - CI-B (HITACHI M-80) , Positivesplash10-001i-0900000000-c02b7869dea8f1113cb4View in MoNA
LC-MS/MSLC-MS/MS Spectrum - EI-B (HITACHI RMU-6M) , Positivesplash10-001i-2900000000-7339e3ff66ab63ba3409View in MoNA
LC-MS/MSLC-MS/MS Spectrum - EI-B (HITACHI M-80B) , Positivesplash10-0ugi-8900000000-1b72d0d216af15365444View in MoNA
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QTOF (UPLC Q-Tof Premier, Waters) , Positivesplash10-067i-2900000000-76d2db81f3822a698f0aView in MoNA
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QTOF , positivesplash10-067i-2900000000-76d2db81f3822a698f0aView in MoNA
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 10V, Positivesplash10-001i-1900000000-4b1b083c8fdb2a27206bView in MoNA
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 20V, Positivesplash10-00lr-2900000000-eee6045375789bd7b511View in MoNA
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 40V, Positivesplash10-0f6x-9400000000-ffef407879854d06bd7eView in MoNA
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 10V, Negativesplash10-001i-0900000000-074611feed644fd89c07View in MoNA
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 20V, Negativesplash10-001i-0900000000-cbf5bec188b738c514afView in MoNA
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 40V, Negativesplash10-01p6-9600000000-5eb930cf87b199a5f449View in MoNA
1D NMR1H NMR SpectrumNot AvailableView in JSpectraViewer
2D NMR[1H,13C] 2D NMR SpectrumNot AvailableView in JSpectraViewer
Toxicity Profile
Route of ExposureInhalation; dermal; ingestion
Mechanism of ToxicityCinnamaldehyde is an allergen. The physiologic effect of cinnamaldehyde is by means of increased histamine release and cell-mediated immunity.
MetabolismCinnamaldehyde is converted to cinnamoyl-CoA by cinnamoyl-CoA reductase.
Toxicity ValuesLD50: 3400 mg/kg (rat, oral)
Lethal DoseNot Available
Carcinogenicity (IARC Classification)No indication of carcinogenicity to humans (not listed by IARC).
Uses/SourcesNot Available
Minimum Risk LevelNot Available
Health EffectsAllergic reaction.
SymptomsThe specific symptoms that can result from cinnamic aldehyde allergy can vary considerably amongst patients from a severe anaphylactic reaction to asthma, abdominal symptoms, eczema or headaches. (6)
TreatmentNot Available
Normal Concentrations
Not Available
Abnormal Concentrations
Not Available
DrugBank IDNot Available
PubChem Compound ID637511
ChEMBL IDNot Available
ChemSpider ID553117
UniProt IDNot Available
ChEBI ID16731
CTD IDC012843
Stitch IDNot Available
PDB IDNot Available
ACToR IDNot Available
Wikipedia LinkCinnamaldehyde
Synthesis ReferenceLiu, Xue-mei. Synthesis of cinnamaldehyde. Qufu Shifan Daxue Xuebao, Ziran Kexueban (2005), 31(2), 96-98.
General References
  1. Muller G, Biering A, Graubaum K, Jeschkeit H, Neubert K, Kleine R, Klapperstuck M: [The PABA test]. Dtsch Z Verdau Stoffwechselkr. 1984;44(5):219-31. [6334604 ]
  2. Smith CK, Moore CA, Elahi EN, Smart AT, Hotchkiss SA: Human skin absorption and metabolism of the contact allergens, cinnamic aldehyde, and cinnamic alcohol. Toxicol Appl Pharmacol. 2000 Nov 1;168(3):189-99. [11042091 ]
  3. Bandell M, Story GM, Hwang SW, Viswanath V, Eid SR, Petrus MJ, Earley TJ, Patapoutian A: Noxious cold ion channel TRPA1 is activated by pungent compounds and bradykinin. Neuron. 2004 Mar 25;41(6):849-57. [15046718 ]
  4. Smith CK, Cheung C, Elahi EN, Hotchkiss SA: High-performance liquid chromatography method for the quantification of non-radiolabelled cinnamic compounds in analytes derived from human skin absorption and metabolism experiments. J Chromatogr B Biomed Sci Appl. 2001 Jul 15;758(2):249-64. [11486835 ]
  5. Bruze M, Johansen JD, Andersen KE, Frosch P, Lepoittevin JP, Rastogi S, Wakelin S, White I, Menne T: Deodorants: an experimental provocation study with cinnamic aldehyde. J Am Acad Dermatol. 2003 Feb;48(2):194-200. [12582388 ]
  6. Right Diagnosis: Non-Food Allergy -- Cinnamic aldehyde [Link]
Gene Regulation
Up-Regulated GenesNot Available
Down-Regulated GenesNot Available


General Function:
S-nitrosoglutathione binding
Specific Function:
Conjugation of reduced glutathione to a wide number of exogenous and endogenous hydrophobic electrophiles. Regulates negatively CDK5 activity via p25/p35 translocation to prevent neurodegeneration.
Gene Name:
Uniprot ID:
Molecular Weight:
23355.625 Da
  1. van Iersel ML, Ploemen JP, Lo Bello M, Federici G, van Bladeren PJ: Interactions of alpha, beta-unsaturated aldehydes and ketones with human glutathione S-transferase P1-1. Chem Biol Interact. 1997 Dec 12;108(1-2):67-78. [9463521 ]
General Function:
Thromboxane a2 receptor activity
Specific Function:
Receptor for thromboxane A2 (TXA2), a potent stimulator of platelet aggregation. The activity of this receptor is mediated by a G-protein that activates a phosphatidylinositol-calcium second messenger system. In the kidney, the binding of TXA2 to glomerular TP receptors causes intense vasoconstriction. Activates phospholipase C. Isoform 1 activates adenylyl cyclase. Isoform 2 inhibits adenylyl cyclase.
Gene Name:
Uniprot ID:
Molecular Weight:
37430.69 Da
  1. Ballabeni V, Tognolini M, Bertoni S, Bruni R, Guerrini A, Rueda GM, Barocelli E: Antiplatelet and antithrombotic activities of essential oil from wild Ocotea quixos (Lam.) Kosterm. (Lauraceae) calices from Amazonian Ecuador. Pharmacol Res. 2007 Jan;55(1):23-30. Epub 2006 Sep 29. [17079160 ]