Tritiated Thymidine (3H-TdR) from China
Radioactively labeled nucleoside [methyl-3H]thymidine used in DNA synthesis research. As an organic compound of tritium, it qualifies under HTS 2844.41.00.00 per Chapter 28 Note 1 extensions for radioactive isotopes. Supplied in ethanol solution at high specific activity.
Duty Rate — China → United States
37.5%
Rate breakdown
9903.05.3112.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of China, as provided for in U.S. note 52 to this subchapter
9903.91.0125%Effective with respect to entries on or after September 27, 2024, articles the product of China, as provided for in subdivision (b) of U.S. note 31 to this subchapter
Import Tips
• CDC/USDA permits for biological materials; maintain -20°C chain of custody; declare parent nuclide and activity accurately