Selenium-75 Gamma Source from Canada
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 — 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
• 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