The 4-Chromanone, with the CAS registry number 491-37-2, is also known as 2,3-Dihydro-4H-chromen-4-one. It belongs to the product category of Fused Ring Systems. Its EINECS registry number is 207-736-3. This chemical's molecular formula is C₉H₈O₂ and molecular weight is 148.16. What's more, its IUPAC name is called 2,3-Dihydrochromen-4-one. It should be stored in a cool, dry and well-ventilated place.

Physical properties about 4-Chromanone are: (1)ACD/LogP: 1.618; (2)# of Rule of 5 Violations: 0; (3)ACD/LogD (pH 5.5): 1.62; (4)ACD/LogD (pH 7.4): 1.62; (5)ACD/BCF (pH 5.5): 9.99; (6)ACD/BCF (pH 7.4): 9.99; (7)ACD/KOC (pH 5.5): 180.72; (8)ACD/KOC (pH 7.4): 180.72; (9)#H bond acceptors: 2; (10)#H bond donors: 0; (11)#Freely Rotating Bonds: 0; (12)Polar Surface Area: 26.3 Å²; (13)Index of Refraction: 1.562; (14)Molar Refractivity: 40.163 cm³; (15)Molar Volume: 123.804 cm³; (16)Polarizability: 15.922×10^-24cm³; (17)Surface Tension: 43.55 dyne/cm; (18)Density: 1.197 g/cm³; (19)Flash Point: 128.384 °C; (20)Enthalpy of Vaporization: 49.06 kJ/mol; (21)Boiling Point: 253.224 °C at 760 mmHg; (22)Vapour Pressure: 0.018 mmHg at 25 °C.

Preparation of 4-Chromanone: this chemical can be prepared by 3-phenoxy-propionic acid. This reaction needs reagents P₂O₅ and H₃PO₄ at temperature of 110 °C. The reaction time is 10 min. The yield is 90 %.

Uses of 4-Chromanone: it is used to produce other chemicals. For example, it can react with 2-amino-benzaldehyde to get 6H-chromeno[4,3-b]quinoline. The reaction occurs with reagent KSF clay and other condition of microwave irradiation. The yield is 66 %.

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 and avoid contacting with skin and eyes. 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: c1ccc2c(c1)C(=O)CCO2
(2) InChI: InChI=1S/C9H8O2/c10-8-5-6-11-9-4-2-1-3-7(8)9/h1-4H,5-6H2
(3) InChIKey: MSTDXOZUKAQDRL-UHFFFAOYSA-N

The toxicity data is as follows: