This study explores the dynamics of a Casson nanofluid flowing past an elongated sheet in the presence of chemical reactivity and thermal conductivity. The investigation employs partial differential equations (PDEs) to model the fluid flow, which are subsequently transformed into a system of ordinary differential equations. The numerical resolution of these modified equations is accomplished using the Runge-Kutta method in combination with shooting techniques. This can be attributed to the interplay between electrical conductivity (σ) and the magnitude of the magnetic force, resulting in an electromagnetic force that counteracts fluid motion. Consequently, an increase in the parameter Gm corresponds to a rise in mass buoyancy force, leading to a wider distribution of velocity. The study also highlights the effects of variable thermal conductivity and diffusion coefficient on temperature and concentration contours, respectively.