Insulin Zinc Crystals (Lente Insulin) from China
Amorphous and crystalline zinc-insulin complex providing intermediate duration. HTS 2937.12.00.00 as insulin derivative; zinc modification doesn't trigger Chapter 29 organo-inorganic heading per notes.
Duty Rate — China → United States
100%
Rate breakdown
9903.04.60100%Except as provided in heading 9903.04.61, patented pharmaceutical articles as provided for in subdivisions (c) and (d) 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
• Particle size distribution critical for lente formulations; avoid aggregation
• Refrigerated shipping with suspension aids; validate crystal suspension
• Zinc-insulin specificity maintained in 2937.12 despite metal coordination