Phthalimide from Canada
Phthalimide is an aromatic heterocyclic lactam compound derived from phthalic anhydride, featuring a five-membered ring with a nitrogen hetero-atom fused to a benzene ring. It falls under HTS 2933.79.1500 as an aromatic lactam used primarily as a chemical intermediate in organic synthesis, such as for the Gabriel synthesis of primary amines. This classification aligns with Chapter 29 notes for separate chemically defined organic compounds with nitrogen hetero-atoms.
Duty Rate — Canada → United States
Rate breakdown
Import Tips
• Verify purity certificates to confirm it meets 'chemically defined' criteria under Chapter 29; ensure SDS includes handling as a potential irritant
• Common pitfall: misclassification as a simple amide under 2924 if not emphasizing lactam structure
• Label containers clearly for transport stabilizers if added per note (f)