From Source to Solution
Discover the full range of innovative products and trusted brands that make up the Radnostix family.
Calibration & Reference Products
Radioactive standards and quality control solutions for nuclear medicine and industrial calibration applications.
Theranostics Products
I-131, Tb-161, and theranostic precursors supporting targeted radionuclide therapy.
Co-60 & High Energy Products
High-activity cobalt-60 and other high-energy industrial and medical sources for calibration, research, and system validation.
Medical Devices & Equipment
Shielding solutions, instruments, and essential equipment for nuclear medicine labs and imaging facilities.

Bulk Isotope Sales
Radioisotope supply for manufacturers, research institutions, and radiopharmaceutical production.
Latest News & Announcements
International Isotopes Inc. Announces Company Name Change to Radnostix, Inc.
International Isotopes Inc. today announced that it has filed a Certificate of Amendment in the State of Texas to change our legal name to Radnostix, Inc. Effective immediately, we will officially begin to rebrand all of our operations under the Radnostix name. International Isotopes was started in 1995 as a company focused on irradiation and manufacturing of industrial radioisotope products. Over the years, our focus has evolved, and the name change reflects the Company’s expanding product segments and evolving strategic focus on radioisotopes and theranostics products.
Radnostix (formerly International Isotopes) and AFR Submit NRC Consent Request for New Mexico License Transfer
This filing represents an important procedural step under the previously announced agreement for AFR to acquire INIS’s depleted uranium deconversion and fluorine processing assets for $12.5 million in cash at closing. The NRC’s review and consent process is expected to continue through the remaining period of the transaction’s Outside Date.
Radnostix (formerly International Isotopes) Announces Exclusive North American Distribution and Service Agreement with Globalsonics Research Pty Ltd.
This strategic alliance brings together INIS’s deep capabilities in radiopharmaceuticals, medical devices, and nuclear medicine infrastructure with Globalsonics’ state-of-the-art instrumentation for radiation monitoring, measurement, shielding, and protection. The collaboration is designed to enhance access to cutting-edge technology for nuclear medicine clinics, radiopharmacies, research institutions, and regulatory bodies throughout the U.S. and Canada.
Radnostix Family of Brands



