Entropy generation for convective magnetized Reiner-Rivlin liquid conveying tiny particles stretched flow is addressed. Energy expression comprises dissipation, Ohmic heating, and radiation. Buongiorno model (thermophoresis and random diffusions) for nanomaterial is employed. Isothermal reaction has been also addressed. Non– dimensional differential systems are developed by suitable transformations. Non-dimensional differential expressions are solved by Newton built in-shooting technique. Concentration, temperature, entropy rate and velocity are explored. Thermal transport rate and gradient of concentration against emerging parameters are discussed. Velocity and temperature against magnetic parameter have opposite trends. Entropy rate and gradient of temperature against the magnetic effect are enhanced. An enhancement in fluid flow is noted for convection and Reiner-Rivlin fluid parameters. An increase in radiation effect causes ant increment of entropy rate. Concentration has reverse trend for thermophoresis and reaction variables. The reverse scenario for concentration and mass transport rate holds for the Schmidt number. Similar scenario for temperature and concentration is found through random diffusion variables. A higher Brinkman number causes an enhancement in entropy generation. A larger estimation of radiation effect amplifies the thermal transport rate.