Stabilized Didecylmethylammonium Perfluorooctane Sulfonate from Mexico
This quaternary ammonium salt with added stabilizer for preservation during transport. Remains under HTS 2923.40.00.00 as per Chapter 29 note (f) allowing stabilizers necessary for preservation. Applied in electronics manufacturing for fluorinated surfactants.
Duty Rate — Mexico → United States
16.2%
Rate breakdown
9903.05.5510%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.94, articles the product of Mexico, as provided for in U.S. note 52 to this subchapter
Import Tips
• List stabilizer composition and justify as 'necessary for preservation' per note (f) to prevent reclassification
• Use proper UN packaging for corrosive chemicals; mismatches lead to CBP exam delays
• Monitor MFN duty rates; GSP ineligible due to chemical specificity—confirm country of origin