China Isotope & Radiation Corporation engages in the research and development, manufacture, and sale of diagnostic and therapeutic radiopharmaceuticals and radioactive source products for medical and industrial applications in China. It operates through five segments: Pharmaceuticals; Radioactive Source Products; Irradiation; Radiation Therapy Equipment and Related Services; and Independent Clinical Medical and Laboratory Services, and Other Business. The Pharmaceuticals segment engages in the research, development, manufacture, and sale of imaging diagnostic and therapeutic radiopharmaceuticals; UBT kits and analyzers; and in vitro immunoassay diagnostic reagents and kits. The Radioactive Source Products segment provides medical and industrial radioactive sources products and related technical services. The Irradiation segment offers irradiation services to manufacturers of medical devices, food, traditional Chinese medicine, and cosmetics for sterilization; and EPC services for the design, manufacturing, and installation of gamma ray irradiation facilities. The Radiation Therapy Equipment and Related Services segment sells radiation therapy equipment; and provides related maintenance services. The Independent Clinical Medical and Laboratory Services, and Other Business segment provides independent clinical laboratory services with respect to hepatitis, endocrine, bone metabolism, cardiovascular disease, diabetes, and other diseases to hospitals and other medical institutions. The company was founded in 1983 and is headquartered in Beijing, China. China Isotope & Radiation Corporation is a subsidiary of China National Nuclear Corporation.