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Sigma-Aldrich

Propyne

≥97%

Synonym(s):

Allylene, Methylacetylene

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About This Item

Linear Formula:
CH3C≡CH
CAS Number:
74-99-7
Molecular Weight:
40.06
EC Number:
200-828-4
MDL number:
MFCD00036235
UNSPSC Code:
12142100
PubChem Substance ID:
24871730
NACRES:
NA.22

vapor pressure

204.6 mmHg ( −49.5 °C)

Quality Level

100

assay

≥97%

form

gas

bp

−23.2 °C (lit.)

mp

−102.7 °C (lit.)

SMILES string

CC#C

InChI

1S/C3H4/c1-3-2/h1H,2H3

InChI key

MWWATHDPGQKSAR-UHFFFAOYSA-N

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General description

Propyne (methylacetylene) is commonly used in gas welding.

Application

Propyne (CH3C≡CH) can be used:
  • As a fuel for stoichiometric low-pressure flat-flames in isomer-specific combustion studies.
  • In the synthesis of polycyclic aromatic hydrocarbons under various reaction conditions.
  • In the synthesis of phenylacetylenes.
  • In the selective synthesis of propene by catalytic hydrogenation using Pt/Al2O3 catalyst.

Packaging

Supplied in a Sure/Pac™ cylinder and has a brass needle valve with a male 1/4" NPTF outlet thread installed. Before using the cylinder, ensure that the valve is closed, then remove the galvanized steel hex cap that seals the outlet valve.

Compatible with the following:

Legal Information

Aldrich is a registered trademark of Sigma-Aldrich Co. LLC
Sure/Pac is a trademark of Sigma-Aldrich Co. LLC

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Hazard Classifications

Flam. Gas 1A - Press. Gas Compr. Gas - STOT SE 3

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Respiratory system

Storage Class

2A - Gases

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Certificates of Analysis (COA)

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Propyne hydrogenation over alumina-supported palladium and platinum catalysts
Kennedy DR, et al.
Applied Catalysis A: General, 259(1), 109-120 (2004)
In situ generation of 1-propyne: A useful introduction of 1-propyne on unsaturated halogenated compounds through the Sonogashira reaction
Abraham E and Suffert J
Synlett, 2002(02), 0328-0330 (2002)
Yongping Zhang et al.
Langmuir : the ACS journal of surfaces and colloids, 29(6), 1868-1874 (2013-01-19)
To achieve silicon functionalization for the development of hybrid devices, multifunctional molecules may be employed to attach to the silicon surfaces. It is important to get a fundamental understanding about the molecule/silicon interface chemistry and the binding configuration. The surface
Masumi Asakura et al.
Mutation research, 652(2), 122-130 (2008-03-18)
A gas exposure system using rotating vessels was improved for exposure of cultured mammalian cells to gaseous compounds in the chromosomal aberration assay. This system was composed of 12 square culture vessels, a device for preparation of air containing test
Reaction of phenyl radicals with propyne
Vereecken L, et al.
Journal of the American Chemical Society, 124(11), 2781-2789 (2002)
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