Acetaldehyde
CAS75-07-0
Chemical Formula C2H4O
Synonyms
FORMALDE-FRESH SOLUTION, BUFFERED
FORMALDEHYDE, BUFFERED
FORMALDEHYDE, CARSON-MILLON
Appearance White Solid
HS Code 29121200
MOQ 1 FCL (Full Container Load)
Acetaldehyde, also known as ethanal, is the most basic aldehyde with the formula CH3CHO. It is a colorless, highly volatile liquid produced through catalytic oxidation of ethanol, featuring a pungent yet fruity smell. It serves as a key chemical intermediate in industrial production. In the human body, acetaldehyde is a metabolite of carbohydrates and ethanol. It exists naturally in the environment and is also released during biomass combustion processes.
Parameters
| Property | Value |
| Melting point | -125 °C (lit.) |
| Boiling point | 21 °C (lit.) |
| density | 0.785 g/mL at 25 °C (lit.) |
| vapor density | 1.03 (vs air) |
| vapor pressure | 52 mm Hg (37 °C) |
| refractive index | n20/D 1.377 |
| FEMA | 2003 | ACETALDEHYDE |
| Fp | 133 °F |
| storage temp. | 2-8°C |
| solubility | alcohols: soluble |
| pka | 13.57(at 25℃) |
| form | solution |
| color | White to off-white |
| Specific Gravity | 0.823 (20/4℃) (?90% Soln.) |
| Odor | Pungent, fruity odor detectable at 0.0068 to 1000 ppm (mean = 0.067 ppm) |
| PH | 5 (10g/l, H2O, 20℃) |
| Odor Threshold | 0.0015ppm |
| Odor Type | ethereal |
| biological source | synthetic |
| explosive limit | 4-57%(V) |
| Water Solubility | > 500 g/L (20 ºC) |
| Sensitive | Air Sensitive |
| Merck | 14,39 |
| JECFA Number | 80 |
| BRN | 505984 |
| Henry’s Law Constant | 7.69 at 25 °C (Snider and Dawson, 1985:Benkelberg et al., 1995) |
| Exposure limits | TLV-TWA 180 mg/m3 (100 ppm) (ACGIH), 360 mg/m3 (200 ppm) (NIOSH); STEL 270 mg/m3 (150 ppm); IDLH 10,000 ppm. |
| Dielectric constant | 21.8（5℃） |
| Stability: | Stable, but air sensitive. Substances to be avoided include strong oxidizing agents, strong acids, reducing agents, alkalies, halogens, halogen oxides. Highly flammable. Vapour/air mixtures explosive over a very wide concentration range. May form peroxides in storage. |
| InChIKey | IKHGUXGNUITLKF-UHFFFAOYSA-N |
| LogP | -0.16 |
| CAS DataBase Reference | 75-07-0(CAS DataBase Reference) |
| NIST Chemistry Reference | Acetaldehyde(75-07-0) |
| IARC | 2B (Vol. 36, Sup 7, 71) 1999, 1 (Vol. 100E) 2012 |
| EPA Substance Registry System | Acetaldehyde (75-07-0) |
Safety Information
| Item | Details |
| Hazard Codes | T,Xn,F+,F |
| Risk Statements | 23/24/25-34-40-43-36/37-12-67-11-41-22-10-19 |
| Safety Statements | 36/37-33-16-26 |
| RIDADR | UN 1198 3/PG 3 |
| WGK Germany | 2 |
| RTECS | LP8925000 |
| F | 10 |
| Autoignition Temperature | 185 °C |
| TSCA | Yes |
| HazardClass | 3 |
| PackingGroup | I |
| HS Code | 29121200 |
| Hazardous Substances Data | 75-07-0(Hazardous Substances Data) |
| Toxicity | LD50 orally in rats: 1930 mg/kg (Smyth) |
| IDLA | 2,000 ppm |
Product Application
Acetaldehyde is used as a flavoring agent and occurs naturally in many foods including ripe fruits, cheese, and heated milk. It forms during fermentation processes and is present in small amounts in various food products. Its main applications include manufacturing citrus, apple, and cream‑style flavors and essences.
Logistics Information
Fast delivery time
Inventory orders: 2–3 working days
New production: 7–10 working days
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