Maleimide from Canada
Maleimide is an unsaturated five-membered cyclic imide with a reactive double bond, used in polymer chemistry and bioconjugation. Classified in HTS 2925.19.91.00 as a derivative imide; the imide function determines classification over unsaturation.
Duty Rate — Canada → United States
3.7%
Rate breakdown
9903.03.030%Articles the product of any country, as provided for in subdivision (aa)(ii) of U.S. note 2 to this subchapter
Import Tips
• Polymer-grade vs monomer-grade requires spec sheet; >95% purity stays in 2925
• Light-sensitive; specify opaque packaging on invoice to prevent degradation claims
• Common misclassification as acrylic derivative; emphasize imide ring in documentation