Propadiene
Organic compound (H2C=C=CH2) / From Wikipedia, the free encyclopedia
Propadiene (/proʊpəˈdaɪiːn/) or allene (/ˈæliːn/) is the organic compound with the formula H2C=C=CH2. It is the simplest allene, i.e. a compound with two adjacent carbon double bonds.[3] As a constituent of MAPP gas, it has been used as a fuel for specialized welding.
Quick Facts Names, Identifiers ...
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Names | |||
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Preferred IUPAC name
Propadiene[1] | |||
Other names
Allene[1] Propadiene | |||
Identifiers | |||
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3D model (JSmol) |
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1730774 | |||
ChEBI | |||
ChEMBL | |||
ChemSpider |
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ECHA InfoCard | 100.006.670 | ||
EC Number |
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860 | |||
MeSH | Propadiene | ||
PubChem CID |
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UNII | |||
UN number | 2200 | ||
CompTox Dashboard (EPA) |
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Properties | |||
C3H4 | |||
Molar mass | 40.065 g·mol−1 | ||
Appearance | Colorless gas | ||
Melting point | −136 °C (−213 °F; 137 K) | ||
Boiling point | −34 °C (−29 °F; 239 K) | ||
log P | 1.45 | ||
Hazards | |||
GHS labelling: | |||
[2] | |||
Danger | |||
H220, H280[2] | |||
P210, P377, P381, P410+P403[2] | |||
NFPA 704 (fire diamond) | |||
Explosive limits | 13% | ||
Safety data sheet (SDS) | External MSDS | ||
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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