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Levothyroxine Sodium API Pharmaceutical Grade from Canada

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 — Canada → United States

0%

Rate breakdown

9903.05.860%Universal product exemption (U.S. note 52(b))

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