Levothyroxine Sodium API Pharmaceutical Grade from Japan
Pharmaceutical-grade levothyroxine sodium active pharmaceutical ingredient (API) for compounding thyroid replacement medications. Classified under HTS 2937.90.4000 as the specific sodium salt of synthetic l-thyroxine hormone, an amino-acid derivative used primarily as hormone therapy.
Duty Rate — Japan → United States
15%
Rate breakdown
9903.04.6215%Pharmaceuticals: patented pharma from JP/EU/KR/CH/LI — 15% floor rate
9903.05.860%Universal product exemption (U.S. note 52(b))
9903.05.900%Articles already subject to Section 232 (steel/aluminum/copper + derivatives, autos + parts, wood, medium/heavy vehicles + parts, semiconductors, patented pharma) — U.S. note 52(f)
Import Tips
• Submit Drug Master File (DMF) reference and FDA import alert screening; critical for API classification
• Provide HPLC chromatograms confirming l-isomer purity; racemic mixtures may alter classification
• Declare exact CAS 25416-49-1; mislabeling as generic 'thyroxine' risks reclassification