Ethane (C2H6) is anticipated to be the most stable compound within the carbon-hydrogen system under the 100GPa pressure range. Nevertheless, the properties of ethane under pressure are still poorly documented. Here, we present a comprehensive study of the structural and vibrational properties of C2H6 in a diamond anvil cell at pressures up to 150GPa. To obtain detailed data, ethane single-crystal was grown in a helium pressure-transmitting medium. Utilizing single-crystal x-ray diffraction, the distortion mechanism between the tetragonal and monoclinic phases, occurring over the 3.2-5.2GPa pressure range, is disclosed. Subsequently, no phase transition is observed up to 150GPa. The accurately measured compression curve is compared to various computational approximations. The vibrational modes measured by Raman spectroscopy and infrared absorption are well identified, and their evolution is well reproduced by abinitio calculations. In particular, an unusual anticrossing phenomenon occurs near 40GPa between a rocking and a stretching mode, likely attributable to intermolecular interactions through hydrogen bonding.