CAS 101-39-3PubChem CID 5372813
alpha-METHYLCINNAMALDEHYDE
Alpha-methylcinnamaldehyde is a clear yellow liquid. (NTP, 1992) — CAMEO Chemicals
- IUPAC name
- (E)-2-methyl-3-phenylprop-2-enal
- Molecular formula
- C10H10O
- Molecular weight
- 146.19 g/mol
- Exact mass
- 146.073164938 Da
- XLogP3
- 2.2
- Topological polar surface area
- 17.1 Ų
- Hydrogen-bond donors
- 0
- Hydrogen-bond acceptors
- 1
- Covalent units
- 1
- Defined stereocentres
- 0
Also known as
2-Methyl-3-phenylacrylaldehyde2-methyl-3-phenylprop-2-enal2-Methyl-3-phenylacrolein(E)-2-Methyl-3-phenylacroleinalpha-Methyl-trans-cinnamaldehyde2-Methyl-3-phenyl-2-propenal2-Propenal, 2-methyl-3-phenyl-(E)-Alpha-Methylcinnamaldehyde
16 more reported names
(E)-2-Methyl-3-phenylpropenalalpha-MethylcinnimalCinnamaldehyde, alpha-methylFEMA No. 2697(2E)-2-Methyl-3-phenyl-2-propenalCinnamaldehyde, .alpha.-methyl-2-Methyl-3-phenyl-2-propen-1-al.alpha.-Methylcinnamaldehydealpha-Methylcinnamic aldehydetrans-2-Methyl-3-phenyl-2-propenalNSC 22283Cinnamaldehyde, alpha-methyl-CCRIS 6257trans-Alpha-Methylcinnamaldehydealpha-Methyl-trans-cinnamaldeyhdealpha-Methylcinnamaldehyde [FHFI]
External database identifiers
- EPA DTXSID:DTXSID401018359
- PubMed:21476019
Evidence from additional scientific databases
EMBL-EBI ChEBI
Exact identifier matchCHEBI:89992
2-Methyl-3-phenyl-2-propenal
- Formula
- C10H10O
- Average mass
- 146.189 g/mol
- Monoisotopic mass
- 146.07316 Da
- Formal charge
- 0
Additional curated names
2-Methyl-3-phenylacrolein2-Methyl-3-phenylacrylaldehyde2-Methylcinnamaldehyde(2Z)-2-methyl-3-phenylprop-2-enal3-Phenyl-2-methylacroleinalpha-Methyl cinnamaldehydealpha-Methylcinnamaldehydealpha-Methylcinnamic aldehydea-Methylcinnamaldehyde, 8CIFEMA 2697Methyl cinnamic aldehyde
Cross-references from this source
- CAS: 101-39-3 — KEGG COMPOUND
- MANUAL_X_REF: HMDB0031566 — HMDB
Mapped by: Exact CAS cross-reference in the ChEBI compound record. Retrieved: 2026-08-31. Open source record
NIH PubChem PUG-View
Exact identifier match5372813
Attributed physical-property, hazard, environmental and use annotations.
- Boiling Point: 302 °F at 100 mmHg (NTP, 1992) Source: CAMEO Chemicals
- Boiling Point: 148 °C (27 mm Hg) Source: Joint FAO/WHO Expert Committee on Food Additives (JECFA)
- Density: 1.0407 at 63 °F (NTP, 1992) - Denser than water; will sink Source: CAMEO Chemicals
- Density: 1.034-1.040 Source: Joint FAO/WHO Expert Committee on Food Additives (JECFA)
- Flash Point: 175 °F (NTP, 1992) Source: CAMEO Chemicals
- Physical Description: Alpha-methylcinnamaldehyde is a clear yellow liquid. (NTP, 1992) Source: CAMEO Chemicals
- Physical Description: Liquid; CBI Source: EPA Chemical Data Reporting (CDR)
- Physical Description: Yellow liquid, cinnamon-like odour Source: Joint FAO/WHO Expert Committee on Food Additives (JECFA)
- Refractive Index: 1.598-1.607 Source: Joint FAO/WHO Expert Committee on Food Additives (JECFA)
- Solubility: less than 1 mg/mL at 70 °F (NTP, 1992) Source: CAMEO Chemicals
- Solubility: insoluble in water; soluble in oils Source: Joint FAO/WHO Expert Committee on Food Additives (JECFA)
- Solubility: miscible (in ethanol) Source: Joint FAO/WHO Expert Committee on Food Additives (JECFA)
- First Aid: EYES: First check the victim for contact lenses and remove if present. Flush victim's eyes with water or normal saline solution for 20 to 30 minutes while simultaneously calling a hospital or poison control center. Do not put any ointments, oils, or medication in the victim's eyes without specific instructions from a physician. IMMEDIATELY transport the victim after flushing eyes to a hospital even if no symptoms (such as redness or irritation) develop.; SKIN: IMMEDIATELY flood affected skin with water while removing and isolating all contaminated clothing. Gently wash all affected skin areas thoroughly with soap and water. If symptoms such as redness or irritation develop, IMMEDIATELY call a physician and be prepared to transport the victim to a hospital for treatment.; INHALATION: IMMEDIATELY leave the contaminated area; take deep breaths of fresh air. If symptoms (such as wheezing, coughing, shortness of breath, or burning in the mouth, throat, or chest) develop, call a physician and be prepared to transport the victim to a hospital. Provide proper respiratory protection to rescuers entering an unknown atmosphere. Whenever possible, Self-Contained Breathing Apparatus (SCBA) shou Source: CAMEO Chemicals
- Signal: Warning Source: European Chemicals Agency (ECHA)
- GHS Hazard Statements: H317 (99.7%): May cause an allergic skin reaction [Warning Sensitization, Skin] Source: European Chemicals Agency (ECHA)
- Precautionary Statement Codes: P261, P272, P280, P302+P352, P321, P333+P317, P362+P364, and P501 (click each P-code to see the statement) Source: European Chemicals Agency (ECHA)
- ECHA C&L Notifications Summary: Aggregated GHS information provided per 1826 reports by companies from 10 notifications to the ECHA C&L Inventory.; Information may vary between notifications depending on impurities, additives, and other factors. The percentage value in parenthesis indicates the notified classification ratio from companies that provide hazard codes. Only hazard codes with percentage values above 10% are shown. For more detailed information, please visit ECHA C&L website. Source: European Chemicals Agency (ECHA)
- GHS Hazard Statements: H317 (100%): May cause an allergic skin reaction [Warning Sensitization, Skin]; H400 (84.6%): Very toxic to aquatic life [Warning Hazardous to the aquatic environment, acute hazard]; H411 (84.6%): Toxic to aquatic life with long lasting effects [Hazardous to the aquatic environment, long-term hazard] Source: European Chemicals Agency (ECHA)
- Precautionary Statement Codes: P261, P272, P273, P280, P302+P352, P321, P333+P317, P362+P364, P391, and P501 (click each P-code to see the statement) Source: European Chemicals Agency (ECHA)
- ECHA C&L Notifications Summary: Aggregated GHS information provided per 13 reports by companies from 3 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.; Information may vary between notifications depending on impurities, additives, and other factors. The percentage value in parenthesis indicates the notified classification ratio from companies that provide hazard codes. Only hazard codes with percentage values above 10% are shown. For more detailed information, please visit ECHA C&L website. Source: European Chemicals Agency (ECHA)
- Consumer Uses: Not Known or Reasonably Ascertainable; Fragrance Source: EPA Chemical Data Reporting (CDR)
- Industry Uses: Fragrance; Flavoring and nutrient Source: EPA Chemical Data Reporting (CDR)
Mapped by: Existing checksum-valid CAS to unique PubChem CID match. Retrieved: 2026-08-31. Open source record
Scientific classifications and hazard annotations provide context and do not replace the market-specific regulatory decision shown above.
Additional source coverage and match status
| Source | Result | Checked |
|---|---|---|
| EMBL-EBI ChEBI | Exact match | 2026-08-31 |
| NIH PubChem PUG-View | Exact match | 2026-08-31 |
A recorded no-match is useful evidence that the source was checked; it is not a claim that the substance does not exist elsewhere.
Retrieved from NIH PubChem on 2026-08-31 by checksum-valid CAS matching. Chemical properties do not replace the regulatory decision on this page.