Acetaldehyde
Acetaldehyde is the aldehyde formed from acetic acid by reduction of the carboxy group. It is the most abundant carcinogen in tobacco smoke. It has a role as an electron acceptor, a mutagen, a carcinogenic agent, a teratogenic agent, an oxidising agent, a mouse metabolite, a Saccharomyces cerevisiae metabolite, an Escherichia coli metabolite, a human metabolite and an EC 3.5.1.4 (amidase) inhibitor.
IUPAC: acetaldehyde
PubChem
Physical & Chemical Properties
| Melting Point | -190.3 °F (NTP, 1992) |
| Boiling Point | 70 °F at 760 mmHg (NTP, 1992) |
| Density | 0.78 at 68 °F (USCG, 1999) - Less dense than water; will float |
| Solubility | 0.1 to 1.0 mg/mL at 66 °F (NTP, 1992) |
| Flash Point | -40 °F (NTP, 1992) |
| Vapor Pressure | 400 mmHg at 40.8 °F ; 760 mmHg at 68.4 °F (NTP, 1992) |
| Appearance | Acetaldehyde appears as a clear colorless liquid with a pungent choking odor. Flash point -36 °F. Boiling point 69 °F. Density 6.5 lb / gal. Vapors are heaver than air and irritate the mucous membranes and especially the eyes. Used to make other chemicals. |
Data: PubChem · Last updated: 4/20/2026
GHS Classification
No GHS classification data available.
Classification data is sourced from ECHA.
Regulatory Compliance
Listed
note: Status based on EPA TSCA Active Inventory · inventory name: TSCA Chemical Substance Inventory
View sourceGlobal Trade Intelligence
No trade flow data available for this chemical.
HS Code(s): 2912
Data: UN Comtrade
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