propanal

Other Definitions
propanal (dict)

font size="+1">Properties
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colspan="2" bgcolor="#FFDEAD" \| General
Name	Propanal
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Chemical formula	C H₃CH₂CHO
Formula weight	58.08 amu
Synonyms	Propionaldehyde, methylacetaldehyde, propionic aldehyde, propaldehyde
CAS number	123-38-6
UN number	1275
colspan="2" bgcolor="#FFDEAD" \| Phase behavior
Melting point	192 K (-81C)
Boiling point	321 K (48C)
Triple point	171 K (-102C) ? bar
Critical point	? ? bar
Δ_fusH	8.59 kJ/mol
Δ_fusS	? J/molK
Δ_vapH	28.3 kJ/mol
Solubility	50-100 mg/ml
colspan="2" bgcolor="#FFDEAD" \| Liquid properties
Δ_fH⁰_liquid	? kJ/mol
S⁰_liquid	? J/molK
C_p	? J/molK
Density	0.81 ×10³ kg/m³
colspan="2" bgcolor="#FFDEAD" \| Gas properties
Δ_fH⁰_gas	? kJ/mol
S⁰_gas	J/molK
C_p	? J/molK
colspan="2" bgcolor="#FFDEAD" \| Safety
Acute effects	Respiratory irritation, dizziness, skin irritation.
Chronic effects	Pulmonary oedema; mutagenic effects have been reported.
Flash point	-26C
Autoignition temperature	175C
Explosive limits	2.3-21%
colspan="2" bgcolor="#FFDEAD" \| More info
Properties	NIST WebBook
MSDS	Hazardous Chemical Database
colspan="2" bgcolor="#FFDEAD" \| SI units were used where possible. Unless otherwise stated, standard conditions were used. Disclaimer and references

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

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

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

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