In this work, photolysis rate coefficients for relevant chemical reactions are calculated at different altitudes by using the radiative transfer model TUV (NCAR). The selected reactions are the photolysis of O₃, HCHO and N₂O. In order to improve the results at high altitudes, a high-resolution grid for oxygen absorption has been considered. The differences with the standard grid were analyzed. The calculations at surface have been carried out by converting irradiance measurements to actinic flux. The comparison with the model results shows a very good agreement depending on the solar zenith angle. The calculated rate coefficients are incorporated into models to evaluate air pollution mechanisms in Córdoba City, Argentina.