Ammonium Perfluorooctane Sulfonate from Canada
Ammonium salt of perfluorooctane sulfonic acid, classified identically to the acid under HTS 2904.31.00.00 per Chapter 29 salt classification rules. Commonly used in fire-fighting foams and coatings.
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
• Provide ammonium content analysis to distinguish from free acid form
• Comply with AFFF foam phase-out regulations in many jurisdictions
• Ensure packaging prevents moisture absorption to maintain stability