Promethium-147 Beta Source from China
Promethium-147 used in thickness gauges for paper/plastic film manufacturing. Falls under HTS 2844.43.00.21 as chemically defined compound of listed rare earth isotope. Chapter 28 note 4 explicitly covers promethium.
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
• Short half-life (2.6 years) requires activity verification within 30 days of shipment
• Use EXEMPT WHITE-II labeling for low activity industrial gauges to simplify import
• Document as 'not mixed with organic compounds' to avoid Chapter 29 reclassification