Acetaldehyde+CAS#75-07-0
Versatile Industrial Use: Acetaldehyde is a widely used chemical intermediate in various industries, such as plastics and chemicals, making it essential for manufacturing processes.
Natural Occurrence: It naturally occurs as a metabolite of sugars and ethanol in humans, and is present in the environment, ensuring its compatibility in natural systems.
High Solubility: Acetaldehyde is highly soluble in water and alcohols, which enhances its effectiveness in a wide range of applications.
Sensitive to Air: While air-sensitive, acetaldehyde’s high volatility and low boiling point (21°C) make it ideal for specific applications where rapid evaporation or reactivity is desired.
Acetaldehyde, also known as ethanal, is the simplest form of aldehyde (CH3CHO). It is a colorless, volatile liquid with a distinct, sharp fruity odor, commonly produced through the catalytic oxidation of ethanol. Industrially, acetaldehyde is widely used as a key chemical intermediate. Additionally, it naturally occurs as a metabolite of sugars and ethanol in humans, is present in the environment, and is generated during biomass combustion.
Parameters
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 | n |
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
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 |
