N-Phenylmaleimide from Germany
N-Phenylmaleimide is a cyclic imide with carboxyimide-function, but classified here under imine derivatives per Chapter Note 3 (last in numerical order) in HTS 2925.29.90.00. Key Diels-Alder dienophile.
Duty Rate — Germany → United States
21.3%
Rate breakdown
9903.04.6211.3%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
9903.05.3910%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.97, articles the product of a member state of the European Union, with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 10 percent, as provided for in U.S. note 52 to this subchapter
Import Tips
• Submit X-ray crystal structure confirming planar imide ring system
• Declare melting point (88-92°C) and purity by HPLC (>99%)
• Include polymerization inhibitor (hydroquinone) concentration