Maleimide from Japan
Maleimide is an unsaturated five-membered aromatic lactam with a nitrogen hetero-atom, used in polymer chemistry and Diels-Alder reactions. Under HTS 2933.79.1500 as other aromatic lactams, it fits the heterocyclic nitrogen-only category per Chapter 29 definitions. Its chemically defined structure excludes it from earlier acyclic headings.
Duty Rate — Japan → United States
21%
Rate breakdown
9903.04.628.5%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
9903.05.4912.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of Japan, with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 12.5 percent, as provided for in U.S. note 52 to this subchapter
Import Tips
• Specify polymerization inhibitor if present as stabilizer; test for epoxide exclusions under note to 2932-2934
• Avoid bulk solvent mixes that trigger note (e) scrutiny