2-Pyridone
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2-Pyridone is an organic compound with the formula C
5H
4NH(O). It is a colourless solid. It is well known to form hydrogen bonded dimers and it is also a classic case of a compound that exists as tautomers.
Quick Facts Names, Identifiers ...
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Names | |||
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Preferred IUPAC name
Pyridin-2(1H)-one | |||
Other names
2(1H)-Pyridinone 2(1H)-Pyridone 1H-Pyridine-2-one 2-Pyridone 1,2-Dihydro-2-oxopyridine 1H-2-Pyridone 2-Oxopyridone 2-Pyridinol 2-Hydroxypyridine | |||
Identifiers | |||
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3D model (JSmol) |
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ChEBI | |||
ChEMBL | |||
ChemSpider |
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ECHA InfoCard | 100.005.019 | ||
EC Number |
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KEGG | |||
PubChem CID |
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RTECS number |
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UNII | |||
CompTox Dashboard (EPA) |
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Properties | |||
C5H5NO | |||
Molar mass | 95.101 g·mol−1 | ||
Appearance | Colourless crystalline solid | ||
Density | 1.39 g/cm3 | ||
Melting point | 107.8 °C (226.0 °F; 380.9 K) | ||
Boiling point | 280 °C (536 °F; 553 K) decomp. | ||
Solubility in other solvents | Soluble in water, methanol, acetone | ||
Acidity (pKa) | 11.65 | ||
UV-vis (λmax) | 293 nm (ε 5900, H2O soln) | ||
Structure | |||
Orthorhombic | |||
planar | |||
4.26 D | |||
Hazards | |||
Occupational safety and health (OHS/OSH): | |||
Main hazards |
irritating | ||
GHS labelling: | |||
Danger | |||
H301, H315, H319, H335 | |||
P261, P264, P270, P271, P280, P301+P310, P302+P352, P304+P340, P305+P351+P338, P312, P321, P330, P332+P313, P337+P313, P362, P403+P233, P405, P501 | |||
NFPA 704 (fire diamond) | |||
Flash point | 210 °C (410 °F; 483 K) | ||
Related compounds | |||
Other anions |
2-Pyridinolate | ||
Other cations |
2-Hydroxypyridinium-ion | ||
Related functional groups |
alcohol, lactam, lactim, pyridine, ketone | ||
Related compounds |
pyridine, thymine, cytosine, uracil, benzene | ||
Supplementary data page | |||
2-Pyridone (data page) | |||
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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