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Propyne
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| Names | |
|---|---|
| Preferred IUPAC name | |
| Other names
Methylacetylene
Methyl acetylene Allylene | |
| Identifiers | |
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)
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TWA 1000 ppm (1650 mg/m3)[2] |
REL (Recommended)
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TWA 1000 ppm (1650 mg/m3)[2] |
IDLH (Immediate danger)
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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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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]
- ^ "Characteristic (Functional) and Substituent Groups". Nomenclature of Organic Chemistry. IUPAC Recommendations and Preferred Names 2013 (Blue Book). Cambridge: The Royal Society of Chemistry. 2014. p. 374. doi:10.1039/9781849733069-00372. ISBN 978-0-85404-182-4.
- ^ a b c d e f g NIOSH Pocket Guide to Chemical Hazards. "#0392". National Institute for Occupational Safety and Health (NIOSH).
- ^ Peter Pässler, Werner Hefner, Klaus Buckl, Helmut Meinass, Andreas Meiswinkel, Hans-Jürgen Wernicke, Günter Ebersberg, Richard Müller, Jürgen Bässler, Hartmut Behringer, Dieter Mayer, "Acetylene" in Ullmann's Encyclopedia of Industrial Chemistry Wiley-VCH, Weinheim 2007 (doi:10.1002/14356007.a01_097.pub2).
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