Propyne
Hydrocarbon compound (HC≡C–CH3) / From Wikipedia, the free encyclopedia
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Propyne (methylacetylene) is an alkyne with the chemical formula CH3C≡CH. It is a component of MAPD gas—along with its isomer propadiene (allene), which was commonly used in gas welding. Unlike acetylene, propyne can be safely condensed.[3]
Quick Facts Names, Identifiers ...
Names | |
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Preferred IUPAC name | |
Other names
Methylacetylene Methyl acetylene Allylene | |
Identifiers | |
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3D model (JSmol) |
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878138 | |
ChEBI | |
ChEMBL | |
ChemSpider | |
ECHA InfoCard | 100.000.754 |
EC Number |
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MeSH | C022030 |
PubChem CID |
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UNII | |
CompTox Dashboard (EPA) |
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Properties | |
C3H4 | |
Molar mass | 40.0639 g/mol |
Appearance | Colorless gas[2] |
Odor | Sweet[2] |
Density | 0.53 g/cm3 |
Melting point | −102.7 °C (−152.9 °F; 170.5 K) |
Boiling point | −23.2 °C (−9.8 °F; 250.0 K) |
Vapor pressure | 5.2 atm (20°C)[2] |
Hazards | |
Explosive limits | 1.7%-?[2] |
NIOSH (US health exposure limits): | |
PEL (Permissible) |
TWA 1000 ppm (1650 mg/m3)[2] |
REL (Recommended) |
TWA 1000 ppm (1650 mg/m3)[2] |
IDLH (Immediate danger) |
1700 ppm[2] |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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