Names
Preferred IUPAC name: Pyridin-2(1)-one
Other names
2(1)-Pyridinone
2(1)-Pyridone
1-Pyridine-2-one
2-Pyridone
1,2-Dihydro-2-oxopyridine
1-2-Pyridone
2-Oxopyridone
2-Pyridinol
2-Hydroxypyridine
Identifiers
CAS Number: 142-08-5
JSmol: Interactive image
ChEBI: CHEBI:16540
ChEMBL: ChEMBL662
ChemSpider: 8537
ECHA InfoCard: 100.005.019
RTECS number: UV1144050
Properties
Chemical formula: C5H5NO
Molar mass: 95.10 g·mol
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: water
K: 11.65
UV-vis: 293 nm (ε 5900, HO soln)
Structure
Crystal structure: Orthorhombic
Molecular shape: planar
Dipole moment: D
Hazards
hazards: irritating
Safety data sheet: See:
R-phrases: R36 R37 R38
S-phrases: S26 S37/39
NFPA 704:
Flash point: 210 °C (410 °F; 483 K)
Related compounds
anions: 2-Pyridinolate
cations: 2-Hydroxypyridinium-ion
functional groups: alcohol
Related compounds: pyridine
Supplementary data page
Structure and
properties: n
Thermodynamic
data: Phase behaviour
Spectral data: UV
Except where otherwise noted, data are given for materials in their(at 25 °C [77 °F], 100 kPa).Except where otherwise noted, data are given for materials in their(at 25 °C [77 °F], 100 kPa).
Infobox references
