Ammonium Lignosulfonate Spray-Dried Powder from Canada
Spray-dried ammonium lignosulfonate powder from neutralized sulfite pulp waste, serves as a water-reducing agent in concrete and emulsion stabilizer. Despite ammonium cation, classified under HTS 3804.00.10.00 as lignin sulfonic acid salt from wood pulp lyes (note: some classifications debate 2847 placement).
Duty Rate — Canada → United States
10%
Rate breakdown
9903.05.2910%Except for products described in headings 9903.05.85–9903.05.93, articles the product of Canada, as provided for in U.S. note 52 to this subchapter
Import Tips
• Confirm with CBP ruling HQ H095672 regarding ammonium variants; documentation must trace to sulfite pulping origin
• Monitor moisture content (<8%) to prevent caking and reclassification as liquid preparation
• Include nitrogen analysis to verify ammonium content vs synthetic substitutes