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Vinylacetylene
Chemical compound / From Wikipedia, the free encyclopedia
Vinylacetylene is the organic compound with the formula C4H4. The colourless gas was once used in the polymer industry. It is composed of both alkyne and alkene groups and is the simplest enyne.
Quick Facts Names, Identifiers ...
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Names | |
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Preferred IUPAC name
But-1-en-3-yne | |
Other names
Butenyne, normal isomer 3-Butene-1-yne, Vinyl acetylene | |
Identifiers | |
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3D model (JSmol) |
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ChEBI | |
ChemSpider |
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ECHA InfoCard | 100.010.650 ![]() |
PubChem CID |
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UNII | |
CompTox Dashboard (EPA) |
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Properties | |
C4H4 | |
Molar mass | 52.07456 g/mol |
Appearance | colourless gas |
Boiling point | 0 to 6 °C (32 to 43 °F; 273 to 279 K) |
low | |
Hazards | |
Occupational safety and health (OHS/OSH): | |
Main hazards |
flammable |
NFPA 704 (fire diamond) | |
Flash point | < −5 °C (23 °F; 268 K) |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Vinylacetylene is extremely dangerous because in high enough concentrations (typically > 30 mole percent, but pressure dependent) it can auto-detonate (explode without air being present) especially at elevated pressures, such as those seen in chemical plants processing C4 hydrocarbons.[2] An example of such an explosion occurred at a Union Carbide plant in Texas City in 1969.[3]