1,3-Phenylenebis(1-methylethylidenebis) cyanic acid, 1,4-phenylene ester from Canada
Complex cyanate ester specifically named in HTS 2929.90.0500, featuring multiple phenylene rings connected via isopropylidene linkages with terminal cyanato groups. Used in advanced composite prepregs for aerospace. The intricate nitrogen-function structure dictates 2929 classification.
Duty Rate — Canada → United States
10%
Rate breakdown
9903.03.0110%Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
Import Tips
• Provide synthesis pathway documentation tracing to exact listed structure
• Declare molecular weight and functionality precisely for customs verification
• Segregate from amines/acids in storage to prevent unwanted side reactions