L-Triiodothyronine (Liothyronine) from Mexico
Liothyronine is a synthetic amino acid derivative of the thyroid hormone T3, used primarily for hypothyroidism and myxedema coma treatment. Classified under HTS 2937.90.4500 as an 'other' amino-acid derivative hormone, it meets Chapter 29 requirements for separate chemically defined organic compounds.
Duty Rate — Mexico → United States
0%
Rate breakdown
9903.05.860%Universal product exemption (U.S. note 52(b))
Import Tips
• Include pharmacopeia compliance certificates (USP/EP) to confirm identity as a pure hormone derivative
• Avoid anti-dusting agents that could render it suitable for specific non-general use per Chapter 29 note (g)
• Declare exact purity levels to prevent reclassification as mixtures outside Chapter 29 scope