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27980

Sigma-Aldrich

Crotonaldehyde, mixture of cis and trans

ratio of cis- and trans-isomers (~1:20), ≥99.5% (GC)

Synonym(s):

2-Butenal, mixture of cis and trans

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About This Item

Linear Formula:
CH3CH=CHCHO
CAS Number:
4170-30-3
Molecular Weight:
70.09
Beilstein:
1209254
MDL number:
MFCD00007003
UNSPSC Code:
12352100
PubChem Substance ID:
57648285
NACRES:
NA.22

Quality Level

200

Assay

≥99.5% (GC)

form

liquid

contains

~0.1% 2,6-di-tert-butyl-4-methylphenol as stabilizer
~1% H2O as stabilizer

refractive index

n20/D 1.437

bp

101-102 °C (lit.)

density

0.853 g/mL at 20 °C (lit.)

storage temp.

2-8°C

SMILES string

C\C=C\C=O

InChI

1S/C4H6O/c1-2-3-4-5/h2-4H,1H3/b3-2+

InChI key

MLUCVPSAIODCQM-NSCUHMNNSA-N

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General description

Crotonaldehyde(2-Butenal) is an α, β-unsaturated aldehyde and extremely reactive compound. It serves as a chemical building block in the production of solvents, sorbates, and, to a lower extent, pharmaceuticals and aroma compounds. Additionally, it can be used as an alcohol denaturant, in leather tanning and in the manufacturing of rubber accelerators.

Application

Crotonaldehyde is used:

  • In the manufacturing of sorbic acid that are widely employed as food preservatives to avoid the food spoilage by microorganisms.

Signal Word

Danger

Hazard Classifications

Acute Tox. 2 Inhalation - Acute Tox. 3 Dermal - Acute Tox. 3 Oral - Aquatic Acute 1 - Eye Dam. 1 - Flam. Liq. 2 - Muta. 2 - Skin Irrit. 2 - STOT RE 2 - STOT SE 3

Target Organs

Respiratory system

Storage Class Code

3 - Flammable liquids

WGK

WGK 3

Flash Point(F)

55.4 °F

Flash Point(C)

13 °C

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

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Sigma-Aldrich

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