Cyclopentadienyl Iron Dicarbonyl Dimer from Mexico
This ferrocene derivative [(CpFe(CO)2)2] features iron-carbon bonds in cyclopentadienyl rings, qualifying as organo-inorganic under 2931.90.90. Used in specialty polymer catalysis; chapter note III(C) prioritizes latest numerical heading.
Duty Rate — Mexico → United States
13.7%
Rate breakdown
9903.05.5510%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.94, articles the product of Mexico, as provided for in U.S. note 52 to this subchapter
Import Tips
• Air-sensitive solid requires inert atmosphere packaging documentation
• Research chemical—may qualify GRI 10 scientific goods duty exemption
• Distinguish from pure metal carbonyls (Ch28) by organic Cp ligand content