The reactions of the CH radical with several alkanes were studied, at room temperature, in a low-pressure fast-flow reactor. CH(X-2 Pi, v = 0) radicals were obtained from the reaction of CHBr3 with potassium atoms. The overall rate constants at 300 K are (0.76 +/- 0.20) x 10(-10) [Fleurat-Lessard, P.; Rayez, J.C.; Bergeat, A.; Loison, J.C. Chem. Phys. 2002, 279, 87], 1 (1.60 +/- 0.60) x 10(-10) [Galland, N.; Caralp, F.; Hannachi, Y.; Bergeat, A.; Loison, J.-C.J. Phys. Chem. A 2003, 107, 5419], 2 (2.20 +/- 0.80) x 10(-10), (2.80 +/- 0.80) x 10(-10), (3.20 +/- 0.80) x 10(-10), (3.30 +/- 0.60) x 10(-10), and (3.60 +/- 0.80) x 10(-10) cm(3) molecule(-1) s(-1), (errors refer to +/- 2 sigma) for methane, ethane, propane, n-butane, n-pentane, neo-pentane, and n-hexane respectively. The experimental overall rate constants correspond to those obtained using a simple classical capture theory. Absolute atomic hydrogen production was determined by V. U. V. resonance fluorescence, with H production from the CH + CH4 reaction being used as a reference. Observed H branching ratios were for CH4, 1.00 [Fleurat-Lessard, P.; Rayez, J.C.; Bergeat, A.; Loison, J.C. Chem. Phys. 2002, 279, 87];(1) C2H6, 0.22 +/- 0.08 [Galland, N.; Caralp, F.; Hannachi, Y.; Bergeat, A.; Loison, J.-C. J. Phys. Chem. A 2003, 107, 5419];(2) C3H8, 0.19 +/- 0.07; C4H10 (n-butane), 0.14 +/- 0.06; C5H12 (n-pentane), 0.52 +/- 0.08; C5H12 (neo-pentane), 0.51 9 +/- 0.08; C5H12 (iso-pentane), 0.12 +/- 0.06; C6H14 (n-hexane), 0.06 +/- 0.04.