Perfluorobutyric Acid Methyl Ester from Japan
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 — Japan → United States
23.8%
Rate breakdown
9903.04.6211.3%Patented pharmaceutical articles that are the product of Japan, of a European Union member country, of South Korea, of Switzerland, or of Liechtenstein as provided for in subdivisions (c) and (f) of U.S. note 40 to this subchapter
9903.05.4912.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of Japan, with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 12.5 percent, as provided for in U.S. note 52 to this subchapter
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