Perfluoro-n-heptanoic Acid Ammonium Salt from Mexico
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.
Duty Rate — Mexico → United States
3.7%
Rate breakdown
9903.03.030%Articles the product of any country, as provided for in subdivision (aa)(ii) of U.S. note 2 to this subchapter
Import Tips
• Salt form reduces corrosivity but declare counterion content accurately
• Provide acid equivalent weight calculation for inventory purposes
• Monitor for PFAS aggregate reporting requirements in destination country