The CAS registry number of 3-Hydroxymethyl-but-3-en-2-one is 73255-29-5. This chemical's molecular formula is C₅H₈O₂ and molecular weight is 100.1158. What's more, its systematic name is called 3-(Hydroxymethyl)but-3-en-2-one.

Physical properties about 3-Hydroxymethyl-but-3-en-2-one are: (1)#of Rule of 5 Violations: 0; (2)ACD/BCF (pH 5.5): 1; (3)ACD/BCF (pH 7.4): 1; (4)ACD/KOC (pH 5.5): 17.82; (5)ACD/KOC (pH 7.4): 17.82; (6)#H bond acceptors: 2; (7)#H bond donors: 1; (8)#Freely Rotating Bonds: 3; (9)Polar Surface Area: 37.3 Å²; (10)Index of Refraction: 1.436; (11)Molar Refractivity: 26.34 cm³; (12)Molar Volume: 100.5 cm³; (13)Polarizability: 10.44×10^-24 cm³; (14)Surface Tension: 31.3 dyne/cm; (15)Density: 0.995 g/cm³; (16)Flash Point: 81 °C; (17)Enthalpy of Vaporization: 51.39 kJ/mol; (18)Boiling Point: 205.5 °C at 760 mmHg; (19)Vapour Pressure: 0.0591 mmHg at 25 °C.

You can still convert the following datas into molecular structure:
(1) SMILES: CC(=O)C(=C)CO
(2) InChI: InChI=1/C5H8O2/c1-4(3-6)5(2)7/h6H,1,3H2,2H3
(3) InChIKey: KRBFQUPTNQVDDS-UHFFFAOYAQ