Biosynergy Inc is a United States-based manufacturer of quality control products designed to assist the medical, food, laboratory, and industrial markets. The Company specializes in the development of time/temperature indicators that change color to signal the occurrence of a damaging heat or freeze event, allowing the user to determine whether or not their product should be used. Its products include core correlated temperature indicators, surface temperature indicators, Hemotemp II Activator, and HemoCool Gel-Pak, and others.