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 Other Businesses. The Pharmaceuticals segment engages in the research, development, manufacture, and sale of imaging diagnostic and therapeutic radiopharmaceuticals; urea breath test kits and analyzers; and in vitro immunoassay diagnostic reagents and kits. The Radioactive Source Products segment sells 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 Other Businesses segment provides independent clinical laboratory services for nuclear technology industry applications and medical product applications; and sells radiation therapy equipment and other miscellaneous services. In addition, the company engages in the production and sale of bio-pharmaceuticals. The company was founded in 1983 and is headquartered in Beijing, China. China Isotope & Radiation Corporation is a subsidiary of China National Nuclear Corporation.