Abstract Parameters of line positions and line intensities up to 2×10 –25 cm −1 /(molecule cm −2 ) for 12 CH 3 35 Cl and 12 CH 3 37 Cl were retrieved from the Fourier transform spectra in the range of 1900–2600 cm −1 . Line intensities were scaled with measurements from literature. Measured line positions and intensities were treated using global effective Hamiltonian and dipole moment model. The RMS of intensity fitting was 7.4% for 12 CH 3 35 Cl and 6.6% for 12 CH 3 37 Cl. List of positions and intensities were calculated for 22,098 and 21,014 lines between 1900 and 2600 cm −1 for 12 CH 3 35 Cl and 12 CH 33 7 Cl, respectively. Updated intensities allow extending assignments. The new line list of positions and intensities for both isotopologues in this spectral region was calculated. The calculations from the line list of this work have been compared with values from the HITRAN2012 database and PNNL spectra.