L-Thyroxine Sodium from Japan
L-Thyroxine sodium is the synthetic sodium salt of thyroxine, a thyroid hormone amino acid derivative used primarily for treating hypothyroidism. It falls under HTS 2937.90.4500 as an amino-acid derivative used primarily as a hormone, fitting Chapter 29's scope for chemically defined organic compounds with hormonal function.
Duty Rate — Japan → United States
15%
Rate breakdown
9903.04.6215%Patented pharmaceutical articles that are the product of Japan, of a European Union member country, of South Korea, of Switzerland, or of Liechtenstein as provided for in subdivisions (c) and (f) of U.S. note 40 to this subchapter
9903.05.860%Articles provided for in subdivision (b) of U.S. note 52 to this subchapter
9903.05.900%Articles of aluminum, of steel or of copper or derivative aluminum or steel articles; passenger vehicles (sedans, sport utility vehicles, crossover utility vehicles, minivans and cargo vans) and light trucks; parts of passenger vehicles (sedans, sport utility vehicles, crossover utility vehicles, minivans and cargo vans) and light trucks; medium- and heavy-duty vehicles; parts of medium- and heavy-duty vehicles; wood products; patented pharmaceutical articles; and semiconductor articles, as provided in subdivision (f) of U.S. note 52 to this subchapter
Import Tips
• Obtain FDA approval and provide certificates of analysis confirming purity as a chemically defined hormone derivative
• Ensure proper pharmaceutical labeling and Drug Master File (DMF) registration to avoid classification disputes
• Verify stability data for transport, as Chapter 29 allows stabilizers only for preservation without altering use