Line positions and intensities of the ν4 band of methyl iodide using mid-infrared optical frequency comb Fourier transform spectroscopy

•High-resolution spectra of CH3I are measured in the CH stretch region from 2800 to 3160 cm-1 using a mid-infrared comb-based Fourier transform spectrometer with comb-mode limited resolution.•New improved assignment is presented for the ν4 band and the nearby ν3+ν4-ν3 hot band.•2603 transitions are assigned to the ν4 band with standard deviation (observed – calculated) of 0.00034 cm-1, and 831 transitions are assigned to the ν3+ν4-ν3 hot band with standard deviation of 0.00084 cm-1.•Hyperfine splittings due to the 127I nuclear quadrupole moment are observed for transitions with J ≤ 2 × K in the ν4 band.•Line intensities are reported for 157 isolated transitions in the ν4 band.