The 6-Hydroxy-2,3-dihydrobenzo[b]furan-3-one, with its cas register number 6272-26-0, has its IUPAC name of 6-hydroxy-1-benzofuran-3-one. And this is a kind of yellow crystalline powder or chunks.

The physical properties of this chemical could be summarized as: (1)#H bond acceptors: 3; (2)#H bond donors: 1; (3)#Freely Rotating Bonds: 1; (4)Polar Surface Area: 35.53; (5)Index of Refraction: 1.635; (6)Molar Refractivity: 37.43 cm³; (7)Molar Volume: 104.4 cm³; (8)Polarizability: 14.83 ×10^-24 cm³; (9)Surface Tension: 61.9 dyne/cm; (10)Density: 1.436 g/cm³; (11)Flash Point: 162.6 °C; (12)Enthalpy of Vaporization: 64.02 kJ/mol; (13)Boiling Point: 369.3 °C at 760 mmHg; (14)Vapour Pressure: 5.66E-06 mmHg at 25°C.

Use of 6-Hydroxy-2,3-dihydrobenzo[b]furan-3-one: (1)6-Hydroxy-2,3-dihydrobenzo[b]furan-3-one could react with 4-hydroxy-benzaldehyde to produce 6-hydroxy-2-((Z)-4-hydroxy-benzylidene)-benzofuran-3-one. This reation could occur in the following condition: reagent: acetic acid, concentrated aqueous hydrochloric acid; reaction temp.: 60 ℃; field: 75.2%.

Preparation of 6-Hydroxy-2,3-dihydrobenzo[b]furan-3-one: this chemical can be prepared by 6-acetoxy-benzofuran-3-ol. This reation could occur in the following condition: reagent: neutral alumina; solvent: neat (no solvent); reaction time: 10 min; reaction temp.: 145 ℃; other conditions: microwave irradiation; field: 91%.

When you are using this chemical, you should be very cautious. Being a kind of harmful chemical, it may cause damage to health and it is also harmful if swallowed. Besides, it is irritating to eyes, respiratory system and skin and may cause inflammation to the skin or other mucous membranes. So you had better take the following instructions while using. Wear suitable gloves and eye/face protection and protective clothing, and if in case of contacting with eyes, rinse immediately with plenty of water and seek medical advice. You could also refer to WGK Germany  3 to obtain more safety information.

Additionally, you could convert the following datas information into the molecular structure:
SMILES:O=C1c2ccc(O)cc2OC1
InChI:InChI=1/C8H6O3/c9-5-1-2-6-7(10)4-11-8(6)3-5/h1-3,9H,4H2
InChIKey:GBDMODVZBPFQKI-UHFFFAOYAH