Radium-226 Calibration Standard from Canada
Radium-226 reference sources for alpha spectrometry calibration in environmental labs. Classified HTS 2844.43.00.21 as listed naturally occurring radioactive isotope. Maintains Chapter 28 classification despite alpha decay products.
Duty Rate — Canada → United States
0%
Rate breakdown
9903.03.030%Articles the product of any country, as provided for in subdivision (aa)(ii) of U.S. note 2 to this subchapter
Import Tips
• Legacy radium requires radon emanation testing and special ventilation certification
• Classify decay chain equilibrium status to determine if activity exceeds thresholds
• Use historical exemption documentation if grandfathered under old AEC licenses