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402788

Sigma-Aldrich

Acetaldehyde

ACS reagent, ≥99.5%

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

ACS reagent

vapor density

1.52 (vs air)

vapor pressure

14.63 psi ( 20 °C)

Assay

≥99.5%

form

liquid

autoignition temp.

365 °F

expl. lim.

60 %

impurities

≤0.008 meq/g Titr. acid

evapn. residue

≤0.005%

refractive index

n20/D 1.332 (lit.)

bp

21 °C (lit.)

mp

−125 °C (lit.)

solubility

alcohols: soluble
water: miscible

density

0.785 g/mL at 25 °C (lit.)

storage temp.

2-8°C

SMILES string

CC=O

InChI

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

InChI key

IKHGUXGNUITLKF-UHFFFAOYSA-N

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This Item
000718.00004W200336
Acetaldehyde ACS reagent, ≥99.5%

Sigma-Aldrich

402788

Acetaldehyde

Acetaldehyde ReagentPlus®, ≥99.0% (GC)

Sigma-Aldrich

00071

Acetaldehyde

Acetaldehyde for synthesis

Sigma-Aldrich

8.00004

Acetaldehyde

Acetaldehyde natural, FG

Sigma-Aldrich

W200336

Acetaldehyde

form

liquid

form

liquid

form

liquid

form

liquid

refractive index

n20/D 1.332 (lit.)

refractive index

n20/D 1.332 (lit.)

refractive index

-

refractive index

n20/D 1.332 (lit.)

bp

21 °C (lit.)

bp

21 °C (lit.)

bp

20.4 °C/1013 hPa

bp

21 °C (lit.)

mp

−125 °C (lit.)

mp

−125 °C (lit.)

mp

-123 °C

mp

−125 °C (lit.)

solubility

alcohols: soluble, water: miscible

solubility

-

solubility

-

solubility

-

General description

Acetaldehyde is an industrially important solvent used as an intermediate for the synthesis of a wide range of compounds. On oxidation it forms acetic acid and ethanol on reduction. The interaction of Criegee intermediate (CH2OO) with acetaldehyde has been measured. Its effect as a neuroactive agent has been studied. Alkynylation reaction of acetaldehyde by asymmetric catalysis has been reported.

Application

Acetaldehyde may be used in the synthesis of 1,3-diamines by one-pot cross double-Mannich reaction and β-amino aldehydes by proline-catalyzed Mannich reaction.

accessory

Product No.
Description
Pricing

related product

Product No.
Description
Pricing

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.

PRTR

NON

FSL

Flammable liquids
Special flammables
Hazardous rank I

ISHL Indicated Name

Substances Subject to be Indicated Names

ISHL Notified Names

Substances Subject to be Notified Names

JAN Code

402788-5ML:4.548173940076E12
402788-100ML:4.548173940052E12
402788-1L:4.548173940069E12


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One-pot cross double-Mannich reaction of acetaldehyde catalyzed by a binaphthyl-based amino sulfonamide.
Kano T, et al.
Chemical Communications (Cambridge, England), 49(11), 1118-1120 (2013)
Direct measurement of Criegee intermediate (CH2OO) reactions with acetone, acetaldehyde, and hexafluoroacetone.
Taatjes CA, et al.
Physical Chemistry Chemical Physics, 14(30), 10391-10400 (2012)
Proline-catalysed Mannich reactions of acetaldehyde.
Yang JW, et al.
Nature, 452(7186), 453-455 (2008)
Eagleson M.
Concise Encyclopedia Chemistry, 4-4 (1994)
Asymmetric Catalytic Alkynylation of Acetaldehyde: Application to the Synthesis of (+)-Tetrahydropyrenophorol.
Trost BM and Quintard A.
Angewandte Chemie (International Edition in English), 51(27), 6704-6708 (2012)

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