Line shape study of acetylene transitions in the ν1 + ν2 + ν4 + ν5 band over a range of temperatures

►We measured self broadened line parameters for transitions in the ν1+ν2+ν4+ν5 band of C2H2 over a range of temperatures. ► The profiles have been fitted using Voigt and speed-dependent Voigt profiles, to which we have added dispersion profiles. ► The self-induced line parameters and their temperature dependences were measured for the first time for this band.