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
9903.05.2910%Section 301 (forced labor) — additional 10% ad valorem on products of Canada
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