The 2-Oxopyridine with CAS registry number of 142-08-5 is also called 2-Hydroxypyridine. The IUPAC name is 1H-pyridin-2-one. Its EINECS registry number is 205-520-3. In addition, the molecular formula is C₅H₅NO and the molecular weight is 95.10. It is a kind of white to light yellow crystal and belongs to the classes of Pyridines; Pyridine; Pyridines derivates; (intermediate of benzoxazole); Nucleotides and Nucleosides; Bases & Related Reagents; Nucleotides. And it should be stored in a cool and dry place.

Physical properties about this chemical are: (1)ACD/LogP: -0.58; (2)ACD/LogD (pH 5.5): -0.58; (3)ACD/LogD (pH 7.4): -0.58; (4)ACD/BCF (pH 5.5): 1; (5)ACD/BCF (pH 7.4): 1; (6)ACD/KOC (pH 5.5): 11.52; (7)ACD/KOC (pH 7.4): 11.52; (8)#H bond acceptors: 2; (9)#H bond donors: 1; (10)Polar Surface Area: 20.31 Å²; (11)Index of Refraction: 1.513; (12)Molar Refractivity: 25.74 cm³; (13)Molar Volume: 85.5 cm³; (14)Polarizability: 10.2 ×10^-24cm³; (15)Surface Tension: 35.7 dyne/cm; (16)Density: 1.111 g/cm³; (17)Flash Point: 181.1 °C; (18)Enthalpy of Vaporization: 56.57 kJ/mol; (19)Boiling Point: 323.7 °C at 760 mmHg; (20)Vapour Pressure: 0.000257 mmHg at 25°C.

Preparation of 2-Oxopyridine: it can be prepared by pyridine 1-oxide. There are some other products, such as pyridin-2-yl-acetonitrile, [2,2']bipyridinyl, pyrrole and pyridine. The yield of this reaction is about 31% at reaction temperature of 750-850 °C.

Uses of 2-Oxopyridine: it can be used to get 2-chloro-pyridine. This reaction will need reagents N-chloruccinimide and PPh₃ and solvent dioxane. The reaction time is 4 hours by heating . The yield is about 43%.

When you are using this chemical, please be cautious about it as the following:
This chemical is irritating to eyes, respiratory system and skin. There is limited evidence of a carcinogenic effect. During using it, wear suitable protective clothing, gloves and eye/face protection and do not breathe dust. In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.

You can still convert the following datas into molecular structure:
(1)SMILES: c1cc[nH]c(=O)c1
(2)InChI: InChI=1/C5H5NO/c7-5-3-1-2-4-6-5/h1-4H,(H,6,7)
(3)InChIKey: UBQKCCHYAOITMY-UHFFFAOYAK

The toxicity data is as follows: