The 2-Acetylbutyrolactone, with the CAS registry number 517-23-7, is also known as 3-Acetyldihydro-2(3H)-furanone. It belongs to the product categories of Ketone; Furan & Benzofuran; Carbonyl Compounds; Lactones; Organic Building Blocks; Heterocycles; Intermediates & Fine Chemicals; Pharmaceuticals. Its EINECS registry number is 208-235-2. This chemical's molecular formula is C₆H₈O₃ and molecular weight is 128.13. What's more, its IUPAC name is called 3-Acetyloxolan-2-one. It should be stored in a cool, dry and sealed place.

Physical properties about 2-Acetylbutyrolactone are: (1)ACD/LogP: -1.217; (2)# of Rule of 5 Violations: 0; (3)ACD/LogD (pH 5.5): -1.22; (4)ACD/LogD (pH 7.4): -1.22; (5)ACD/BCF (pH 5.5): 1.00; (6)ACD/BCF (pH 7.4): 1.00; (7)ACD/KOC (pH 5.5): 5.19; (8)ACD/KOC (pH 7.4): 5.19; (9)#H bond acceptors: 3; (10)#H bond donors: 0; (11)#Freely Rotating Bonds: 1; (12)Polar Surface Area: 43.37 Å²; (13)Index of Refraction: 1.459; (14)Molar Refractivity: 29.388 cm³; (15)Molar Volume: 107.507 cm³; (16)Polarizability: 11.65×10^-24cm³; (17)Surface Tension: 39.39 dyne/cm; (18)Density: 1.192 g/cm³; (19)Flash Point: 128.244 °C; (20)Enthalpy of Vaporization: 49.045 kJ/mol; (21)Boiling Point: 253.078 °C at 760 mmHg; (22)Vapour Pressure: 0.019 mmHg at 25 °C.

Preparation of 2-Acetylbutyrolactone: this chemical can be prepared by oxirane with acetoacetic acid methyl ester. This reaction needs reagent sodium hydroxide and solvents H₂O, ethanol at temperature of -5 – 0 °C. The reaction time is 50 hours. The yield is 78 %.

Uses of 2-Acetylbutyrolactone: (1) it is an important intermediate to synthesize vitamin B,3,4 - disubstituted pyridine and 5-(β-hydroxyethyl) -4- methyl-thiazole. (2) it is used to produce other chemicals. For example, it can react with methanol to get 2-methyl-4,5-dihydro-furan-3-carboxylic acid methyl ester. The reaction occurs with reagent hydrogen chloride and other condition of heating for 4 days. The yield is 19 %.

When you are dealing with this chemical, you should be very careful. This chemical is inflammation to the skin, eyes and respiratory system or other mucous membranes. Therefore, you should wear suitable protective clothing, gloves and eye/face protection. In case of contacting with eyes, you should rinse immediately with plenty of water and seek medical advice.

You can still convert the following datas into molecular structure:
(1) SMILES: O=C1OCCC1C(=O)C
(2) InChI: InChI=1S/C6H8O3/c1-4(7)5-2-3-9-6(5)8/h5H,2-3H2,1H3
(3) InChIKey: OMQHDIHZSDEIFH-UHFFFAOYSA-N