Perfluoroadipic Acid from Canada
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 — Canada → United States
13.7%
Rate breakdown
9903.05.2910%Section 301 (forced labor) — additional 10% ad valorem on products of Canada
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