Kppa targets NASA programs using numerical simulations of chemical kinetics in domains ranging from climate and weather prediction (e.g. NASA Center for Climate Simulation) to energy research (e.g. NASA Greenspace). Kppa will enable larger, more descriptive simulations on smaller, cost-effective computers. By combining knowledge of sparsity in the model data with parameterizations of the target hardware, Kppa will generate code that is more computationally efficient than existing models and improve the performance of models executing on traditional architectures, an immediate benefit to existing programs and infrastructure. Kppa will also improve user productivity and lower barriers to entry by providing a domain specific language for computational chemical kinetics that is easily understood by domain experts (chemists, etc.) and by providing the Kppa Cloud environment to facilitate the rapid development of new chemical operators for use in whole-systems models. Kppa Cloud will also reduce load on NASA Software Systems Support Office (SSSO) since ParaTools will secure, develop, and maintain Kppa Cloud as a hosted service. Non-NASA customers include members of the global energy market, i.e. Shell Oil and ExxonMobil. Researchers from these organizations have expressed interest in using Kppa to study compounds like pentane. This SBIR project will implement the necessary advanced reaction rate calculation to support these studies. Energy researchers at the National Renewable Energy Laboratory (NREL), Oak Ridge National Laboratory (ORNL), and King Abdullah University of Science and Technology (KAUST) are also potential customers. ParaTools will also market Kppa to Earth systems researchers at the National Ocean and Atmospheric Administration (NOAA), the National Center for Atmospheric Research (NCAR), and the National Centre for Atmospheric Science in the United Kingdom. Members of the Atmospheric Modeling Group at Harvard University and the GEOS-Chem steering committee, as well as researchers at Georgia Tech, Virginia Tech, Texas A&M, Massachusetts Institute of Technology, University of Colorado Denver, Colorado State University, Eindhoven University of Technology, Karlsruher Institute fuer Technologie, the University of Leeds, the University of Manchester, and other research organizations worldwide have also expressed a desire to use Kppa in their applications.