N-Phthalyl-L-Glutamic Anhydride from Canada
This aromatic imide derivative serves as a key intermediate in peptide synthesis and pharmaceutical production. Classified under HTS 2925.19.42.00 as an aromatic imide other than saccharin. Its carboxyimide-function structure matches Chapter 29 heading 2925 requirements.
Duty Rate — Canada → United States
16.5%
Rate breakdown
9903.05.2910%Section 301 (forced labor) — additional 10% ad valorem on products of Canada
Import Tips
• Provide chiral purity documentation (HPLC certificate); declare optical rotation specs; avoid packaging that suggests retail sale to prevent 3212 reclassification