Promethium-147 Beta Source from Canada
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 — Canada → United States
10%
Rate breakdown
9903.05.2910%Except for products described in headings 9903.05.85–9903.05.93, articles the product of Canada, as provided for in U.S. note 52 to this subchapter
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