Promethium-147 Beta Source Disks from Mexico
Promethium-147 (atomic no. 61) oxide ceramic disks for beta thickness gauging in manufacturing, explicitly covered by heading 2844 note (a). Classified HTS 2844.43.00 as rare earth radioactive element.
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
• Provide beta endpoint energy (225 keV) and specific activity documentation
• Include Sm-147 daughter identification for decay chain
• Rare earth classification per 2844 note distinguishes from other chapters