The 3,4-Epoxytetrahydrofuran, with the CAS registry number 285-69-8, has the systematic name of 3,6-dioxabicyclo[3.1.0]hexane. It is a kind of clear yellow liquid, and should be stored at 0-6°C. And the molecular formula of the chemical is C₄H₆O₂.

The physical properties of 3,4-Epoxytetrahydrofuran are as followings: (1)ACD/LogP: -0.46; (2)# of Rule of 5 Violations: 0; (3)ACD/LogD (pH 5.5): -0.46; (4)ACD/LogD (pH 7.4): -0.46; (5)ACD/BCF (pH 5.5): 1; (6)ACD/BCF (pH 7.4): 1; (7)ACD/KOC (pH 5.5): 13.36; (8)ACD/KOC (pH 7.4): 13.36; (9)#H bond acceptors: 2; (10)#H bond donors: 0; (11)#Freely Rotating Bonds: 0; (12)Polar Surface Area: 21.76 Å²; (13)Index of Refraction: 1.478; (14)Molar Refractivity: 19.7 cm³; (15)Molar Volume: 69.5 cm³; (16)Polarizability: 7.81×10^-24cm³; (17)Surface Tension: 42.9 dyne/cm; (18)Density: 1.237 g/cm³; (19)Flash Point: 31.1 °C; (20)Enthalpy of Vaporization: 35.06 kJ/mol; (21)Boiling Point: 128 °C at 760 mmHg; (22)Vapour Pressure: 13.2 mmHg at 25°C.

You should be cautious while dealing with this chemical. It is a kind of flammable chemical which irritates to eyes, respiratory system and skin. Therefore, you had better take the following instructions: Keep away from sources of ignition - No smoking; Wear suitable protective clothing, gloves and eye/face protection, and in case of contacting with eyes, rinse immediately with plenty of water and seek medical advice; Do not breathe gas/fumes/vapor/spray (appropriate wording to be specified by the manufacturer).

You can still convert the following datas into molecular structure:
(1)SMILES: O1C2COCC12
(2)InChI: InChI=1/C4H6O2/c1-3-4(6-3)2-5-1/h3-4H,1-2H2
(3)InChIKey: AIUTZIYTEUMXGG-UHFFFAOYAN