How Our Team Can Help

Moravek offers radiolabeling services to researchers worldwide using carbon-14 and tritium. We offer custom radiolabeling services as well as an extensive catalog of many radiolabeled compounds to suit a wide variety of research needs.

Available Radiolabels


Carbon-14 (14C) is a widely used radiolabel due to its excellent radiochemical properties. It has a long half-life of 5730 years, so there is no need to account for radioactive decay during a lengthy study. The position of the carbon-14 label in the compound is exact and the label has minimal chance of isotope exchange. Carbon-14 has a higher emission energy than tritium and is easily detected at low doses. Even very small doses (~0.1 – 1 µCi) are measurable with some advanced detectors. For these reasons and more, carbon-14 is the preferred radiolabel for early phase clinical trials, such as mass balance/AME studies.

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Tritium (3H) is another routinely used radiolabel for research. Depending on the production method, a material may be generally labeled, nominally labeled, or exactly labeled with tritium. Tritium-labeled products generally have a higher molar activity, which corresponds to more activity with less mass. Additionally, tritium-labeled products are typically less expensive and can often be produced more quickly if the appropriate starting material is provided or commercially available.

Learn More About Tritium Radiolabeling Services

Custom Radiolabeling Services

Moravek is a leading provider of custom radiolabeling services, routinely producing high-quality custom compounds labeled with carbon-14 or tritium in support of a wide variety of research projects, including non-clinical and clinical studies. Our team of radiochemists is proficient in developing efficient radiosynthetic routes or production methods and can oftentimes offer multiple feasible options for a label position, so that you can select a label position that is appropriate for your research goals.

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Radiolabeled Catalog Items

Moravek’s catalog offers a wide variety of non-GMP radiolabeled products to suit many non-clinical research needs.
Browse Our Catalog