The results of an analytical study of n-bulane oxidation in a jet-stirred flow reactor arc presented. Experimental measurements were made in the temperature range 900-1200 K at pressures extending from 1 to lOatm for a wide range of fuel-oxygen equivalence ratios (0.15 to 4.0). A chemical kinetic reaction mechanism developed previously and extended to reproduce the experimental data is detailed, it consists of 344 reversible reactions plus reverse among 51 species. Good agreement between computed and measured concentrations of major chemical species was obtained in the entire experimental area. The major reaction paths for n-butane consumption and for the formation of main products were identified, showing the influence of pressure and equivalence ratios The same mechanism was used to model the ignition of n-butane in a shock tube. Experimental ignition delays measured behind reflected shock waves were accurately reproduced, extending the validation of the mechanism up to I400K