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
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
• 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