Selenium-75 Gamma Source from China
Selenium-75 well logging sources for oilfield gamma ray measurements. HTS 2844.43.00.21 covers this specific gamma-emitting isotope used in sealed form. Chemically defined per Chapter 28 subheading note.
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
• Oilfield sources need API Spec 5DP certification for downhole encapsulation
• Coordinate with DOT PHMSA for highway transport exemption under 49 CFR 173.427
• Declare as 'not for medical use' to avoid FDA radiation safety oversight