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277460

Sigma-Aldrich

3-(Methylthio)propionaldehyde

96%

Synonym(s):

3-(Methylmercapto)propionaldehyde, 3-(Methylthio)propanal, Methional, NSC 15874

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About This Item

Linear Formula:
CH3SCH2CH2CHO
CAS Number:
3268-49-3
Molecular Weight:
104.17
Beilstein:
1739289
EC Number:
221-882-5
MDL number:
MFCD00007022
UNSPSC Code:
12352100
PubChem Substance ID:
24856764
NACRES:
NA.22

vapor density

>1 (vs air)

vapor pressure

760 mmHg ( 165 °C)

Assay

96%

form

liquid

refractive index

n20/D 1.483 (lit.)

bp

165-166 °C (lit.)

density

1.043 g/mL at 25 °C (lit.)

storage temp.

2-8°C

SMILES string

CSCCC=O

InChI

1S/C4H8OS/c1-6-4-2-3-5/h3H,2,4H2,1H3

InChI key

CLUWOWRTHNNBBU-UHFFFAOYSA-N

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General description

3-(Methylthio)propionaldehyde (methional) is the major product of chemical methionine conversion via Strecker degradation in food.

Application

3-(Methylthio)propionaldehyde has been used as a reactant in:
  • Oxidative coupling and chemoselective oxidation
  • Intermolecular alkyne hydroacylation reactions
  • Oxidation of sulfides to sulfoxides
It can also be used as a biosynthetic precursor of ethylene.

Pictograms

Skull and crossbonesCorrosion
GHS06,GHS05

Signal Word

Danger

Hazard Classifications

Acute Tox. 3 Dermal - Acute Tox. 4 Inhalation - Acute Tox. 4 Oral - Aquatic Chronic 3 - Eye Dam. 1 - Skin Irrit. 2 - Skin Sens. 1

Storage Class Code

6.1C - Combustible acute toxic Cat.3 / toxic compounds or compounds which causing chronic effects

WGK

WGK 1

Flash Point(F)

165.2 °F - closed cup

Flash Point(C)

74 °C - closed cup

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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M M W Etschmann et al.
Applied microbiology and biotechnology, 80(4), 579-587 (2008-07-04)
Yeasts can convert amino acids to flavor alcohols following the Ehrlich pathway, a reaction sequence comprising transamination, decarboxylation, and reduction. The alcohols can be further derivatized to the acetate esters by alcohol acetyl transferase. Using L: -methionine as sole nitrogen
Ethylene formation from methional.
W A Pryor et al.
Biochemical and biophysical research communications, 81(2), 498-503 (1978-03-30)
A Escudero et al.
Journal of agricultural and food chemistry, 48(9), 4268-4272 (2000-09-20)
A young white wine that had undergone spontaneous oxidation and showed a strong off-flavor reminiscent of cooked vegetables was demixed by salting out to obtain an ethanolic extract that retained the off-flavor of the wine, as was demonstrated by sensory
F Amárita et al.
FEMS microbiology letters, 204(1), 189-195 (2001-10-30)
Lactic acid bacteria were screened for methional production from 4-methylthio-2-ketobutanoate. Only Lactococcus lactis IFPL730 produced high amounts of methional. It was demonstrated that production of this compound was an exclusively enzymatic reaction. The present work describes for the first time
Rong Di et al.
Journal of agricultural and food chemistry, 51(19), 5695-5702 (2003-09-04)
The primary flavor compound in potato, methional, is synthesized from methionine by the Strecker degradation reaction. A major problem associated with potato processing is the loss of methional. Methional or its precursor, methionine, is not added back during potato processing
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