Thermal rate constants of the reaction of CH(((II)-I-2)) with H-2 have been measured at pressures between 1 and 160 bar and temperatures between 185 and 800 K. CH radicals have been generated using multiphoton laser hash photolysis of CHBr3 at 248 nm and detected by saturated laser-induced fluorescence near 430 nm. At low pressures the reaction leads to CH2(B-3) and H, while at high pressures CH3 radicals are produced. S-shaped transition curves have been constructed to describe the pressure dependence of the rate constant. The high-pressure limiting rate constant for the recombination to CH3 has been evaluated to be k(1 infinity) = 2.O X 10(-1O)(T/300 K)(0,15) cm(3) molecule(-1) s(-1). Using experimental low-pressure data from the literature, the rate constant for the second channel could be separated and has been analyzed in terms of SACM theory. A simple kinetic model has been applied to describe the overall rate constant k(1) in an extended temperature and pressure range. Related rate constants for the reaction of CH2(B-3) with H and the unimolecular two-channel dissociation of CH3 have also been analyzed.