</>Build with Tariff Intelligence|Programmatic access to tariff calculations and HS code classification.Explore Developer Resources →

Californium-253 Metal Target from Japan

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 — 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

Secure DOE fundamental research determination; provide neutron flux measurements

Use doubly encapsulated sources in Type B(M) packages; document pressure/temperature tests