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2845.90.01.00/Carbon-14 Labeled Urea/Mexico

Carbon-14 Labeled Urea from Mexico

Urea with carbon-14 isotope substitution, used in biochemical tracer studies and radiometric dating. Classified in HTS 2845.90.0100 as an organic compound of a non-2844 isotope.

Duty Rate — Mexico → United States

10%

Rate breakdown

9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
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Import Tips

• Include half-life and activity concentration in docs; ensure CDR registration for research chemicals; use lead-shielded packaging per DOT rules