Radium-226 Calibration Standard from Mexico
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 — Mexico → United States
10%
Rate breakdown
9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
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