The CryoStor series of cell-specific, optimized freeze media, is designed to prepare and preserve cells in ultra low temperature environments (-70¿C to -196¿C). CryoStor CS10, pre-formulated with 10% DMSO, provides a safe, protective environment during the freezing, storage, and thawing process for cells and tissues with a requirement for 10% DMSO. Through modulating the molecular-biological response to the cryopreservation process, CryoStor provides for enhanced cell viability and functionality while eliminating the need for serum, proteins or high levels of cytotoxic agents.