Fumaronitrile from Mexico
Fumaronitrile (NC-CH=CH-CN) is a trans-dicyanoethylene used in Diels-Alder reactions and dyes. HTS 2926.90.5050 for unsaturated nitrile-function compounds under Chapter 29 definitions. Highly electron-deficient dienophile.
Duty Rate — Mexico → United States
10%
Rate breakdown
9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
Import Tips
• Sublimation risk; use sealed containers with desiccants
• Trans isomer confirmation via IR spectroscopy
• Toxicity higher than mononitriles; enhanced PPE declarations