Perfluorobutyric Acid Methyl Ester from Canada
Methyl ester of perfluorobutanoic acid, maintaining full perhalogenation on acyclic chain. Classified 2903.78.00.00 as ester remains with parent perhalogenated hydrocarbon per chapter classification rules. Used as fluorinated solvent intermediate.
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
• Esters classified with parent acid; reference corresponding acid HTS in documentation
• Lower flammability than typical esters; still requires UN 1760 shipping papers
• Avoid water contamination during storage to prevent hydrolysis back to acid