Perfluorobutanoic Acid (PFBA)
PFBA is a short-chain perfluorocarboxylic acid with the formula C3F7COOH, fully fluorinated acyclic hydrocarbon derivative. Classified in 2903.78.00.00 as a perhalogenated compound meeting chapter 29 criteria for chemically defined organic compounds. Used in surfactant applications and chemical synthesis.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If classified primarily by saturated acyclic carboxylic acid function
Could be argued under oxygen-function carboxylic acids if perhalogenation not principal characteristic.
If when put up as finishing agents for textiles
Formulations for specific finishing applications move to Chapter 38 miscellaneous chemical products.
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Import Tips & Compliance
• Confirm PFAS regulatory status in destination country; emerging restrictions on short-chain alternatives
• Provide NMR or GC-MS analysis confirming perhalogenation and purity >98%
• Label containers with UN hazard class 1760 for corrosive liquids during transport
Related Products under HTS 2903.78.00.00
Perfluorooctanoic Acid (PFOA)
PFOA is a fully fluorinated carboxylic acid, a perhalogenated derivative of an acyclic hydrocarbon with all hydrogens replaced by fluorine atoms. It falls under HTS 2903.78.00.00 as an acyclic perhalogenated compound containing two or more different halogens (fluorine and implied structure). Commonly used in industrial applications but now heavily regulated due to environmental concerns.
Perfluoropentanoic Acid (PFPeA)
PFPeA (C4F9COOH) represents medium-chain perfluorinated carboxylic acids, fully halogenated acyclic derivatives. Falls under 2903.78.00.00 per chapter notes for halogenated hydrocarbons with multiple halogens. Intermediate in fluoropolymer production.
Perfluorohexanoic Acid (PFHxA)
PFHxA is a six-carbon perfluorocarboxylic acid used in fluorochemical manufacturing. As a perhalogenated acyclic hydrocarbon derivative containing only fluorine, it precisely matches 2903.78.00.00 criteria. Subject to increasing environmental scrutiny.
Perfluoropropionic Acid (PFPrA)
Shortest commercial perfluorocarboxylic acid (C2F5COOH), fully fluorinated with no hydrogen on carbon chain. 2903.78.00.00 classification reflects perhalogenated acyclic hydrocarbon derivative status. Used in specialty fluorochemical synthesis.
Perfluorobutyric Acid Methyl Ester
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.
Perfluoro-n-heptanoic Acid Ammonium Salt
Ammonium salt of C6F13COOH, fully perhalogenated carboxylic acid derivative. 2903.78.00.00 applies per chapter note 3(C)(1) classifying inorganic salts with parent organic compound. Common surfactant form in commercial applications.