Ammonium Bifluoride from Canada
Ammonium bifluoride ((NH4)HF2) is an inorganic acid salt applied in industrial cleaning, oil well acidizing, and metal pickling. Classified under HTS 2826.19.1000 as an 'other' ammonium fluoride complex. It qualifies as a chemically defined fluorine salt per Chapter 28 definitions, excluding organic derivatives.
Duty Rate — Canada → United States
13.1%
Rate breakdown
9903.05.2910%Section 301 (forced labor) — additional 10% ad valorem on products of Canada
Import Tips
• Classify based on stoichiometric formula; bifluoride remains under fluorides, not acids of heading 2811
• Comply with DOT hazardous shipping regs (Class 8 corrosive); label as 'ammonium hydrogen difluoride' accurately
• Request advance ruling from CBP if purity <98% to prevent reclassification as mixtures under 3824