Californium-253 Metal Target from China
Californium-253 metal is a high-specific-activity neutron source material shaped as a target for research reactors and calibration standards. HTS 2844.42.00.00 covers this pure metallic form of listed Californium-253 isotope. Its extreme neutron emission requires specialized encapsulation.
Duty Rate — China → United States
37.5%
Rate breakdown
9903.91.0125%Effective with respect to entries on or after September 27, 2024, articles the product of China, as provided for in subdivision (b) of U.S. note 31 to this subchapter
9903.05.3112.5%Section 301 (forced labor) — additional 12.5% ad valorem on products of China
Import Tips
• Secure DOE fundamental research determination; provide neutron flux measurements
• Use doubly encapsulated sources in Type B(M) packages; document pressure/temperature tests