Isoergosine from Japan
Isoergosine is an isomer of ergosine from rye ergot, used in stereochemistry studies. HTS 2939.69.00.00 covers this as a rye ergot derivative; chapter note (b) includes isomers of organic compounds. Chemically defined and separate from mixtures.
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
Import Tips
• Chiral analysis certificate essential for isomer verification
• Chapter note (b) allows isomer mixtures if same compound base
• Retail sale packing triggers Chapter 33/38 preparations