l-Thyroxine (Levothyroxine), sodium
Hormones, prostaglandins, thromboxanes and leukotrienes, natural or reproduced by synthesis; derivatives and structural analogues thereof, including chain modified polypeptides, used primarily as hormones: > Other: > Amino-acid derivatives: > l-Thyroxine (Levothyroxine), sodium
Duty Rate (from China)
Articles the product of any country, as provided for in subdivision (aa)(ii) of U.S. note 2 to this subchapter
Products classified 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.
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.
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.