Line intensities of the three lowest fundamentals of the 1 2 CH 3 D Triad are modeled with an RMS of 3.2% using over 2100 observed values retrieved by multispectrum fitting of enriched sample spectra recorded with two Fourier transform spectrometers. The band strengths of the Triad in units of 10 - 1 8 cm - 1 /(molecule cm - 2 ) at 296 K are, respectively, 2.33 for ν 6 (E) at 1161 cm - 1 , 1.75 for ν 3 (A 1 ) at 1307 cm - 1 and 0.571 for ν 5 (E) at 1472 cm - 1 . The total calculated absorption arising from 1 2 CH 3 D Triad fundamentals is 4.65x10 - 1 8 cm - 1 /(molecule cm - 2 ) at 296 K. In addition, some 740 intensities of nine hotbands are fitted to 8.1%; most of the hotband measurements belong to 2ν 6 -ν 6 and ν 3 +ν 6 -ν 3 near 1160 cm - 1 , 2ν 3 -ν 3 near 1290 cm - 1 and ν 3 +ν 6 -ν 6 near 1304 cm - 1 . The other observed hotbands are ν 5 +ν 6 -ν 6 , 2ν 5 -ν 5 , ν 5 +ν 6 -ν 5 , ν 3 +ν 5 -ν 3 , and ν 3 +ν 5 -ν 5 .