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
9903.91.0125%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
9903.05.3112.5%Section 301 (forced labor) — additional 12.5% ad valorem on products of China
Import Tips
• CDC/USDA permits for biological materials; maintain -20°C chain of custody; declare parent nuclide and activity accurately