The CAS register number of 2H-Pyran-2-one is 504-31-4. It also can be called as 2-Pyranone and the IUPAC name about this chemical is pyran-2-one. The molecular formula about this chemical is C₅H₄O₂ and the molecular weight is 96.08.

Physical properties about 2H-Pyran-2-one are: (1)ACD/LogP: -0.21; (2)ACD/LogD (pH 5.5): -0.2; (3)ACD/LogD (pH 7.4): -0.2; (4)ACD/BCF (pH 5.5): 1; (5)ACD/BCF (pH 7.4): 1; (6)ACD/KOC (pH 5.5): 18.44; (7)ACD/KOC (pH 7.4): 18.44; (8)#H bond acceptors: 2; (9)Polar Surface Area: 26.3 Å²; (10)Index of Refraction: 1.507; (11)Molar Refractivity: 24 cm³; (12)Molar Volume: 80.5 cm³; (13)Polarizability: 9.51x10^-24cm³; (14)Surface Tension: 38.9 dyne/cm; (15)Density: 1.192 g/cm³; (16)Flash Point: 89.2 °C; (17)Enthalpy of Vaporization: 44.38 kJ/mol; (18)Boiling Point: 207.5 °C at 760 mmHg; (19)Vapour Pressure: 0.225 mmHg at 25 °C.

Preparation: this chemical can be prepared by 5-bromo-5,6-dihydro-pyran-2-one. This reaction will need reagent of triethylamine.

Uses of 2H-Pyran-2-one: it can be used to produce thiopyran-2-thione and pyran-2-one. This reaction will need reagent of Lawesson's reagent and solvent of benzene. The reaction time is 40 hours. The yield is about 11%.

When you are using this chemical, please be cautious about it as the following:
This chemical is harmful to the environment and it can pollute the water, do not put materials into the water. If you want to store it, you should keep the container tightly sealed in dry, cool places and avoid contact with oxide, source of ignition. It is stable under normal temperature and pressure. If you want to use this chemical, do not breathe vapour and avoid contact with skin and eyes.

You can still convert the following datas into molecular structure:
(1)SMILES: O=C\1O\C=C/C=C/1
(2)InChI: InChI=1/C5H4O2/c6-5-3-1-2-4-7-5/h1-4H
(3)InChIKey: ZPSJGADGUYYRKE-UHFFFAOYAI
(4)Std. InChI: InChI=1S/C5H4O2/c6-5-3-1-2-4-7-5/h1-4H
(5)Std. InChIKey: ZPSJGADGUYYRKE-UHFFFAOYSA-N