Levothyroxine Sodium BP/EP Grade
European Pharmacopoeia (EP) and British Pharmacopoeia (BP) compliant levothyroxine sodium for international thyroid hormone formulations. Falls under HTS 2937.90.4000 as the chemically defined sodium salt of l-thyroxine, a Chapter 29 hormone derivative.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If iodine content dominates over organic hormone structure
High iodine compounds might classify as iodine elements, but organic hormone function prevails.
If for amino acid function emphasis over hormonal use
Chapter notes prioritize latest numerical heading; 2937 supersedes 2922 for proven hormones.
If diagnostic reagent kits containing levothyroxine
Lab reagents move to 3822; therapeutic hormone API stays in Chapter 29.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right HTS code — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Provide EP/BP certificates of compliance; US importers often need USP equivalence bridging studies
• Declare iodine content precisely (<0.1% free iodine); impurities affect classification purity
• Avoid retail packaging; bulk drums only to prevent Chapter 30 misclassification
Related Products under HTS 2937.90.40.00
Levothyroxine Sodium USP Powder
Levothyroxine sodium USP is the sodium salt of l-thyroxine, a synthetic thyroid hormone used primarily for treating hypothyroidism. It falls under HTS 2937.90.4000 as an amino-acid derivative hormone, specifically l-thyroxine sodium, meeting Chapter 29's criteria for chemically defined organic compounds used as hormones.
Levothyroxine Sodium API Pharmaceutical Grade
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.
Veterinary Levothyroxine Sodium Powder
Levothyroxine sodium powder formulated for veterinary thyroid treatment in dogs and cats. Classified in HTS 2937.90.4000 as l-thyroxine sodium hormone regardless of human/animal therapeutic use, per Chapter 29 hormone provisions.
Synthroid Active Ingredient Levothyroxine Sodium
Bulk levothyroxine sodium serving as the active ingredient in brand-name Synthroid tablets for hypothyroidism treatment. HTS 2937.90.4000 applies to this specific l-thyroxine sodium salt as a synthetic hormone amino-acid derivative.