Lactam (Beta-Propiolactam) from Japan
Beta-propiolactam, though strained, functions as an acyclic amide equivalent in reactivity. HTS 2924.19.80.00 accommodates it as an 'other' acyclic amide derivative before potential polymerization.
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
• Highly reactive; inhibitor-stabilized shipping required
• Polymer precursor declaration for end-use verification
• Avoid ring emphasis preventing acyclic classification