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00070

Sigma-Aldrich

Acetaldehyde

puriss. p.a., anhydrous, ≥99.5% (GC)

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Synonym(s):
Ethanal
Linear Formula:
CH3CHO
CAS Number:
Molecular Weight:
44.05
Beilstein:
505984
EC Number:
MDL number:
eCl@ss:
39021102
PubChem Substance ID:
NACRES:
NA.21

biological source

synthetic

Quality Level

grade

anhydrous
puriss. p.a.

vapor density

1.52 (vs air)

vapor pressure

14.63 psi ( 20 °C)

Assay

≥99.5% (GC)

form

liquid

autoignition temp.

365 °F

quality

anhydrous

expl. lim.

60 %

impurities

≤0.5% free acid (as CH3COOH)

evapn. residue

≤0.002%

refractive index

n20/D 1.332 (lit.)
n20/D 1.332

bp

21 °C (lit.)

mp

−125 °C (lit.)

density

0.785 g/mL at 25 °C (lit.)

cation traces

Al: ≤0.5 mg/kg
Ba: ≤0.1 mg/kg
Bi: ≤0.1 mg/kg
Ca: ≤0.5 mg/kg
Cd: ≤0.05 mg/kg
Co: ≤0.02 mg/kg
Cr: ≤0.02 mg/kg
Cu: ≤0.02 mg/kg
Fe: ≤0.5 mg/kg
K: ≤0.5 mg/kg
Li: ≤0.1 mg/kg
Mg: ≤0.1 mg/kg
Mn: ≤0.02 mg/kg
Mo: ≤0.1 mg/kg
Na: ≤0.5 mg/kg
Ni: ≤0.02 mg/kg
Pb: ≤0.1 mg/kg
Sr: ≤0.1 mg/kg
Zn: ≤0.1 mg/kg

SMILES string

CC=O

storage temp.

2-8°C

InChI

1S/C2H4O/c1-2-3/h2H,1H3

InChI key

IKHGUXGNUITLKF-UHFFFAOYSA-N

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This Item
00071402788W200336
Acetaldehyde puriss. p.a., anhydrous, ≥99.5% (GC)

00070

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Acetaldehyde ReagentPlus®, ≥99.0% (GC)

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Acetaldehyde ACS reagent, ≥99.5%

402788

Acetaldehyde

Acetaldehyde natural, FG

W200336

Acetaldehyde

Quality Level

100

Quality Level

200

Quality Level

200

Quality Level

400

bp

21 °C (lit.)

bp

21 °C (lit.)

bp

21 °C (lit.)

bp

21 °C (lit.)

form

liquid

form

liquid

form

liquid

form

liquid

storage temp.

2-8°C

storage temp.

2-8°C

storage temp.

2-8°C

storage temp.

2-8°C

refractive index

n20/D 1.332 (lit.)

refractive index

n20/D 1.332 (lit.)

refractive index

n20/D 1.332 (lit.)

refractive index

n20/D 1.332 (lit.)

General description

Acetaldehyde is an organic colorless flammable liquid. It can be produced by hydration of acetylene and by catalytic oxidation of ethyl alcohol. It is mainly used in manufacturing acetic acid.
Mechanism of the thermal decomposition of acetaldehyde has been reported. It is a product of ethanol metabolism in the liver, binds covalently to various proteins, thereby alters the liver function and structure. The aldol condensation of acetaldehyde and heptanal in the presence of hydrotalcite-type catalysts has been described.

Application

Acetaldehyde may be used for the enzymatic synthesis of fatty acids.
It was used in the plasma polymerization for deposition of reactive aldehyde groups onto substrate, in a study to produce fibrous biomaterials with cell adhesive and also repulsive capability in biomedical applications. It was also used as calibration standard during determination of acetone, acetaldehyde, ethanol, and methanol in different human matrices, such as whole blood, vitreous humour, and urine using gas chromatography with flame ionization detection method (GC–FID).

Caution

forms easily paraldehyde

Signal Word

Danger

Hazard Classifications

Carc. 1B - Eye Irrit. 2 - Flam. Liq. 1 - Muta. 2 - STOT SE 3

Target Organs

Respiratory system

Storage Class Code

3 - Flammable liquids

WGK

WGK 3

Flash Point(F)

-38.0 °F - closed cup

Flash Point(C)

-38.89 °C - closed cup

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Regulatory Listings

Regulatory Listings are mainly provided for chemical products. Only limited information can be provided here for non-chemical products. No entry means none of the components are listed. It is the user’s obligation to ensure the safe and legal use of the product.

EU REACH Annex XVII (Restriction List)

CAS No.

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GC determination of acetone, acetaldehyde, ethanol, and methanol in biological matrices and cell culture.
Pontes, Helena, et al.
Journal of Chromatographic Science, 47.4, 272-278 (2009)
C S Lieber
Biochemical Society transactions, 16(3), 241-247 (1988-06-01)
Acetaldehyde, the toxic product of ethanol metabolism in the liver, covalently binds to a variety of proteins, thereby altering liver function and structure. Through its binding to tubulin, acetaldehyde decreases the polymerization of microtubules thereby impairing protein secretion and favouring
Bruce D. Craig, David S. Anderson
Handbook of Corrosion Data, 87-87 (1994)
THE ENZYMATIC SYNTHESIS OF FATTY ACIDS BY ALDOL CONDENSATION.
R O Brady
Proceedings of the National Academy of Sciences of the United States of America, 44(10), 993-998 (1958-10-15)
Raghu Sivaramakrishnan et al.
The journal of physical chemistry. A, 119(28), 7724-7733 (2015-03-21)
The mechanism for the thermal decomposition of acetaldehyde has been revisited with an analysis of literature kinetics experiments using theoretical kinetics. The present modeling study was motivated by recent observations, with very sensitive diagnostics, of some unexpected products in high

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