Diketopiperazine from Germany
Diketopiperazine is a cyclic amide formed by the condensation of two amino acids, featuring a six-membered ring with two amide groups. It falls under HTS 2924.29.95.00 as a cyclic amide derivative not specified elsewhere in the heading. Commonly used as a peptide synthesis intermediate in pharmaceutical manufacturing.
Duty Rate — Germany → United States
6.5%
Rate breakdown
9903.03.030%Articles the product of any country, as provided for in subdivision (aa)(ii) of U.S. note 2 to this subchapter
Import Tips
• Verify purity certificates as impurities may affect classification; ensure chemical safety data sheets comply with TSCA; declare exact CAS number on entry to avoid reclassification