In this paper, we report measured Lorentz self-broadening and self-induced pressure-shift coefficients of 12 CH 3 D in the ν 2 fundamental band (ν 0 ≈2200cm −1 ). The multispectrum fitting technique allowed us to analyze simultaneously seven self-broadened absorption spectra. All spectra were recorded at the McMath-Pierce Fourier transform spectrometer of the National Solar Observatory (NSO) on Kitt Peak, AZ with an unapodized resolution of 0.0056cm −1 . Low-pressure (0.98–2.95Torr) as well as high-pressure (17.5–303Torr) spectra of 12 C-enriched CH 3 D were recorded at room temperature to determine the pressure-broadening coefficients of 408 ν 2 transitions with quantum numbers as high as J″=21 and K=18, where K″=K′≡K (for a parallel band). The measured self-broadening coefficients range from 0.0349 to 0.0896cm −1 atm −1 at 296K. All the measured pressure-shifts are negative. The reported pressure-induced self-shift coefficients vary from about −0.004 to −0.008cm −1 atm −1 . We have examined the dependence of the measured broadening and shift parameters on the J″, and K quantum numbers and also developed empirical expressions to describe the broadening coefficients in terms of m (m=−J″, J″, and J″+1 in the Q P-, Q Q-, and Q R-branch, respectively) and K. On average, the empirical expressions reproduce the measured broadening coefficients to within 3.6%. A semiclassical theory based upon the Robert–Bonamy formalism of interacting linear molecules has been used to calculate these self-broadening and self-induced pressure-shift coefficients. In addition to the electrostatic interactions involving the octopole and hexadecapole moments of CH 3 D, the intermolecular potential includes also an atom–atom Lennard–Jones model. For low K (K⩽3) with |m|⩽8 the theoretical results of the broadening coefficients are in overall good agreement (3.0%) with the experimental data. For transitions with K approaching |m|, they are generally significantly underestimated (8.8%). The theoretical self-induced pressure shifts, whose vibrational contribution is derived from results in the Q Q-branch, are generally smaller in magnitude than the experimental data in the Q P-, and Q R-branches (15.2%).