| Identification | |
| Name: | 2H-Pyran-2-one |
| Synonyms: | 1,2-Pyrone(4CI); 2,4-Pentadienoic acid, 5-hydroxy-, d-lactone; 2-Pyranone; 2-Pyrone; 2H-Pyran, 2-oxo-;Coumalin; a-Pyrone |
| CAS: | 504-31-4 |
| EINECS: | 207-990-5 |
| Molecular Formula: | C5H4 O2 |
| Molecular Weight: | 96.08 |
| InChI: | InChI=1/C5H4O2/c6-5-3-1-2-4-7-5/h1-4H |
| Molecular Structure: |  |
| Properties | |
| Melting Point: | 8-9 °C |
| Flash Point: | 89.2°C |
| Boiling Point: | 102-103 °C20 mm Hg(lit.) |
| Density: | 1.192g/cm3 |
| Refractive index: | n20/D 1.53(lit.) |
| Appearance: | Clear yellow to brown liquid |
| Flash Point: | 89.2°C |
| Safety Data | |
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