For Hg1−xCdxTe, in the range ofx&bartil;0.2–0.3, the optical dispersion parameters (single‐oscillator energyE0,dispersion energyEd, and lattice‐oscillator energyE1) and the fitting parameter of the exponential optical absorption (steepness factor &sgr;) were analyzed using the data by Finkman and co‐workers [J. Appl. Phys.50, 4356 (1979); J. Appl. Phys.56, 2896 (1984)]. For Hg1−xCdxTe the values ofE0,Ed, and &sgr; in this composition range are smaller than those for CdTe, andE1is larger than that for CdTe. The results suggest that the chemical bonding of Hg1−xCdxTe in the range ofx&bartil;0.2–0.3 is smaller than that of CdTe.