Propionaldehyde
Methylacetaldehyde
Propionic aldehyde
Propaldehyde
C₂, C₃: sp³

Propionaldehyde
Systematic name	Propanal
Synonyms
Chemical formula	C3H6O
SMILES	CCC=O
Molecular mass	58.080 g mol−1
Appearance	Colorless liquid Pungent, fruity odor
CAS number	*
UN number	1275
Properties
Density	0.81 g cm−3
Solubility in water	20 g/100 ml (? °C)
Melting point	−81°C (192 K)
Boiling point	46-50°C (321 K)
Viscosity	0.6 cP at 20°C
Structure
Molecular shape	C1, O: sp2
Dipole moment	2.52 D
Hazards
MSDS	External MSDS
EU classification	Highly flammable (F) Irritant (Xi)
R-phrases	,
S-phrases	, ,
Flash point	−26°C
Autoignition temperature	175°C
RTECS number	?
Supplementary data page
Structure and properties	n, εr, etc.
Thermodynamic data	Phase behaviour Solid, liquid, gas
Spectral data	UV, IR, NMR, MS
Related compounds
Related aldehydes	Formaldehyde Acetaldehyde Butanal
Chemical infobox

''Note that propanol is a different compound.

In organic chemistry, propanal or propionaldehyde is the aldehyde of the 3 carbon propyl group. It has a chemical formula of CH₃CH₂CHO, and is a structural isomer of propanone. At room temperature, it is a colourless liquid with a slightly irritating, fruity odour.

Production

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Propanal is mainly produced through the Fischer-Tropsch synthesis, combining synthesis gas (carbon monoxide and hydrogen) with ethene over a metal catalyst:

CO + H₂ + C₂H₄ → CH₃CH₂CHO

Uses

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It is principally used to make trimethylolethane through condensation with methanol; this process is important in the production of alkyd resins.

External links

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Aldehydes

Propanal | Προπανάλη | Propanal | プロピオンアルデヒド | Propanal