Radium-226 Calibration Standard from Japan
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 — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Section 301 (forced labor) — Japan (col1 rate < 12.5 percent): MFN < 12.5% → total duty capped at 12.5%
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