1,8-Naphthalimide from Canada
1,8-Naphthalimide is an aromatic lactam featuring a fused naphthalene ring system with a nitrogen-containing heterocyclic imide group. It qualifies for HTS 2933.79.1500 as an aromatic lactam employed in fluorescent dyes and optical brighteners. The classification adheres to Chapter 29's priority for last numerical order among applicable heterocyclic headings.
Duty Rate — Canada → United States
110%
Rate breakdown
9903.04.6093.5%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
9903.05.2910%Except for products described in headings 9903.05.85–9903.05.93, articles the product of Canada, as provided for in U.S. note 52 to this subchapter
Import Tips
• Certify non-coloring matter status to avoid Chapter 32 exclusion; document stabilizer additions under note (f)
• Common issue: confusion with heading 3204 if dyed