Computer based simulation of quantum mechanical reactive scattering is a CPU intensive process. Despite the small I/O traffic a single simulation requires several thousand CPU hours. The ABC program provides an impelementation for quantum mechanical reaction simulation in such a way that the code can be efficiently ported to parallel computing platforms. The Computational Chemistry and Application Porting Support groups of the EGEE project worked together to create a grid enabled version of the ABC code. The collaboration resulted a Grid application that is capable of using several clusters and storage servers of the EGEE Grid symultaneously, achieving significant speed-up. The application has been ported to EGEE Grid as a parameter study application with the P-GRADE Grid portal. The paper describes the application porting process, the technical analysis and performance of the local and the Grid enabled ABC application.