Perfluoroadipic Acid from Mexico
HOOC-(CF2)4-COOH, dicarboxylic perhalogenated acyclic hydrocarbon derivative. Falls under 2903.78.00.00 as fully fluorinated compound meeting all chapter note criteria. Used in fluoropolymer monomer synthesis.
Duty Rate — Mexico → United States
110%
Rate breakdown
9903.04.6096.3%Except as provided in heading 9903.04.61, patented pharmaceutical articles as provided for in subdivisions (c) and (d) of U.S. note 40 to this subchapter
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
• Specify linearity of chain (n-perfluoroadipic vs branched) in technical specs
• Higher melting point requires heated transport considerations
• Dual carboxylic functions; provide titration data confirming both active sites