<p>A study is carried out on the dissipative stagnation point flow of the two-dimensional magnetohydrodynamic (MHD) Casson nanofluid over a stretched surface under the influence of porous media, thermal radiation, heat source, binary chemical reaction effects, variable thermal conductivity and variable surface heat flux condition. Similarity transformations are employed to transform the governing equations into ordinary differential equations. Using the R-K fourth-order technique with the shooting method, we numerically solve the aforementioned equations. Graphs and tables present the outcomes for temperature, concentration and velocity distributions. There is a strong agreement between our results and the results from a prior study. This study has proven that the fluids move more slowly due to a magnetic field. Moreover, the increase in the nanofluid temperature is correlated with an increase in thermal radiation and heat source. It is also shown that the increase in the chemical reaction slows down the mass profile but a reverse effect is seen for the activation energy parameter. The mass profile declines as the suction, velocity ratio, thermal conductivity, chemical reaction parameters and Schmidt number increase but a reverse effect is seen for the magnetic field, Casson, thermal radiation and the activation energy parameters.</p>