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00071

Sigma-Aldrich

Acetaldehyde

ReagentPlus®, ≥99.0% (GC)

Synonym(s):

Ethanal

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5 ML
$35.40
100 ML
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500 ML
$134.69
1 L
$192.00

About This Item

Linear Formula:
CH3CHO
CAS Number:
Molecular Weight:
44.05
Beilstein/REAXYS Number:
505984
EC Number:
MDL number:
UNSPSC Code:
12352114
eCl@ss:
39021102
PubChem Substance ID:
NACRES:
NA.21

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biological source

synthetic

Quality Level

vapor density

1.52 (vs air)

vapor pressure

14.63 psi ( 20 °C)

product line

ReagentPlus®

assay

≥99.0% (GC)

form

liquid

autoignition temp.

365 °F

expl. lim.

60 %

refractive index

n20/D 1.332 (lit.)

bp

21 °C (lit.)

mp

−125 °C (lit.)

density

0.785 g/mL at 25 °C (lit.)

functional group

aldehyde

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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1 of 4

This Item
4027888.00004W200336
biological source

synthetic

biological source

synthetic

biological source

-

biological source

-

vapor density

1.52 (vs air)

vapor density

1.52 (vs air)

vapor density

-

vapor density

1.52 (vs air)

vapor pressure

14.63 psi ( 20 °C)

vapor pressure

14.63 psi ( 20 °C)

vapor pressure

1006 hPa ( 20 °C)

vapor pressure

14.63 psi ( 20 °C)

product line

ReagentPlus®

product line

-

product line

-

product line

-

assay

≥99.0% (GC)

assay

≥99.5%

assay

≥99% (GC)

assay

≥99% (GC)

form

liquid

form

liquid

form

liquid

form

liquid

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.[1]
Mechanism of the thermal decomposition of acetaldehyde has been reported.[2] It is a product of ethanol metabolism in the liver, binds covalently to various proteins, thereby alters the liver function and structure.[3] The aldol condensation of acetaldehyde and heptanal in the presence of hydrotalcite-type catalysts has been described.[4]

Application

Acetaldehyde may be used for the enzymatic synthesis of fatty acids.[5]
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.[6] 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).[7]

Caution

forms easily paraldehyde

Legal Information

ReagentPlus is a registered trademark of Merck KGaA, Darmstadt, Germany

signalword

Danger

Hazard Classifications

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

target_organs

Respiratory system

Storage Class

3 - Flammable liquids

wgk_germany

WGK 3

flash_point_f

-38.0 °F - closed cup

flash_point_c

-38.89 °C - closed cup

ppe

Eyeshields, Faceshields, Gloves


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Questions

1–2 of 2 Questions  
  1. How is shipping temperature determined? And how is it related to the product storage temperature?

    1 answer
    1. Products may be shipped at a different temperature than the recommended long-term storage temperature. If the product quality is sensitive to short-term exposure to conditions other than the recommended long-term storage, it will be shipped on wet or dry-ice. If the product quality is NOT affected by short-term exposure to conditions other than the recommended long-term storage, it will be shipped at ambient temperature. As shipping routes are configured for minimum transit times, shipping at ambient temperature helps control shipping costs for our customers. For more information, please refer to the Storage and Transport Conditions document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/316/622/storage-transport-conditions-mk.pdf

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  2. How can I determine the shelf life / expiration / retest date of this product?

    1 answer
    1. If this product has an expiration or retest date, it will be shown on the Certificate of Analysis (COA, CofA). If there is no retest or expiration date listed on the product's COA, we do not have suitable stability data to determine a shelf life. For these products, the only date on the COA will be the release date; a retest, expiration, or use-by-date will not be displayed.
      For all products, we recommend handling per defined conditions as printed in our product literature and website product descriptions. We recommend that products should be routinely inspected by customers to ensure they perform as expected.
      For products without retest or expiration dates, our standard warranty of 1 year from the date of shipment is applicable.
      For more information, please refer to the Product Dating Information document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/449/386/product-dating-information-mk.pdf

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